Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bc419a9c2618ec…

MALICIOUS

PDF

79.9 KB Created: 2021-07-17 16:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d8255fdfa8f5fc45c16431acd08eaf61 SHA-1: a40549a7d2340a4c4b00ad2f27b33f89ed776576 SHA-256: 94bc419a9c2618ecbe731241307a8e58fa1e2d3d68361b7ce50692dfbec75a57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains a large number of external URIs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to manipulate search engine results or redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://geodavidepini.it/userfiles/files/15977039278.pdf In PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/50c4f43a20d9567cc84e96dcc43766bd/88699383362.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/gexijobetojarunod.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a508c59605a---detevanezekel.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e081bf105---wanoguxuruxejag.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/loxuxojepeso.pdfIn PDF document text
    • https://kawanmto.net/contents//files/refojusizirefamu.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca77d5b2e3---76669674566.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/75931046606.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/c7963cfce7aa53082c24d3208902fe7d/26993897110.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/9940fd21e762e2d7d24e3cde1cb2819b/62591993107.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/90674608569.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/obhrqa84pudk85b34fsmdeai55/42402837892.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/31202438082.pdfIn PDF document text
    • http://furniture83.com/upload/files/merumevoma.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/nodijuvox.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/a332b0ab2c616f18dc04a0b6519ed48b/635510870.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/nipip.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ed8afe1c5cb---bugowagipamo.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32187170db---50588899669.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609434b6084b7---tepar.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160792d2473dcd---gipoxufifabixezixubi.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/jf1ar23179rfj8p535dog60sr6/sabomuboxetabufemikepijif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=chapter+10+chemical+quantities+page+247+answersPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87F 17180 bytes
SHA-256: 3fadd9083a50b7228b7d0d69421782909f6f4792bc98c9aeb7b9f0460d66e50b
font_02_sfnt_off0001155f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155F 11488 bytes
SHA-256: 4705495f2aa1c86f4b88efba0817fc340f9b99944ccb76dcf4b9b86fc4511aaf

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