Malicious PDF — malware analysis report

Static analysis result for SHA-256 065608bb0346675e…

MALICIOUS

PDF

92.8 KB Created: 2021-07-01 21:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 69cc50c4ae740c28f0528bb28815b924 SHA-1: cd05bf62e726dca70588bad78fe837af6c3a9451 SHA-256: 065608bb0346675eedc8434ecd37439d3c87fee97a80073da265d3a949adab9e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of multiple links pointing to compromised WordPress sites and a heuristic for a 'download button' lure suggests the document is designed to trick users into downloading further malware. No scripts were extracted, but the overall structure and URL findings point to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae4b34d0aa---49664064966.pdf In PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/309980d95dc8b709b7af77131f3c6646/73895370131.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b02349377---dewovumososek.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/1eb2326ca300fc6572fa18d2725ba9a0/dizexoxa.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/8psv6818eh7nqgmhq6hqdkjaje/wubowabepupisoxisa.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905dd456afd---xudunejujurawanob.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/fec0e1153f50ca3637f9735b115bafbb/74632408014.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/360ca690f5f67c34bac879ec00496fb4/36398361251.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/22034143943.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/6be420cae9e66010bd6946227bf04242/58725906857.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160750315d97da---24777812619.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/kuvanufomadidofumow.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ff6af2602f165de0066b50bf4ae2f51/17054338419.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/32441209248.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607aebec883f1---75606095346.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f4b934183---fixunasoweni.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cd0306644---17646000926.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e68bd55c0---fodelutidulisadosixa.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/92182757589.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/kipuvepe.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/79751798342.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608361c6035e2---jekotijituvem.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609865d146fa1---nereros.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84b11b5497.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/31829404288.pdfIn PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/17614165585.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=download+8+ball+pool+long+line+hackPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 17484 bytes
SHA-256: 4991d2dd3f2cbc98f094172c3e82889097a466f4615be002d15ba62410058421
font_01_sfnt_off00010821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10821 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12033 16416 bytes
SHA-256: 0db2a2ed314181cd5e0cc1d03d2be8fe547ddb3d6176e7da6911c0978b4bebbc
font_03_sfnt_off00014ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AC6 10956 bytes
SHA-256: 568d4505d050058ba390878a3cac58015d5c457c79ec33e1a0d53c18a490f1df