Malicious PDF — malware analysis report

Static analysis result for SHA-256 d996b5a85166b72f…

MALICIOUS

PDF

78.9 KB Created: 2021-09-03 00:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b32dcb50027bf6a5598bedfb021aa85e SHA-1: 124fdd79a703ae9d95438ec1a0cadc75db297c7b SHA-256: d996b5a85166b72faa6f37d753da073d9c5135d2ac0ef9115d7a570e4e55c80f
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple domains, some of which are hosted on compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware distribution sites. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://taigesw.com/upload/files/8616634194.pdf In PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f5b2105c1---tukibuwet.pdfIn PDF document text
    • https://unitjaya.com/contents//files/28901632093.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/4a383b1b41f4161e86ce53245d4caa42/zogudajotuk.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/c7d0bcbc940edf77654838eaa392d8e8/fezabanakij.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/24931996507.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/5999d799d8ee975a246446278d4a09bc/24873511737.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608575898abc5---16064682980.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/49175538726.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081303484e2c---22312432030.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875c8cd1ea7---dijomikupegixekese.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/96043779469.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6b2524891a8dd6000b1aff56983ff78a/tozafukirivarojogenepipej.pdfIn PDF document text
    • http://runningrhinelanderrabbitry.com/clients/875187/File/2659120522.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/24544624612.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/gosedizebagiremojobid.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/27760488804.pdfIn PDF document text
    • http://anael.fr/fckeditor/userfiles/file/xinezuw.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/muratililazelozazodejizu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/sl0p79jr7foe1hr05uffag59tg/6261172128.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=kelebihan+dan+kekurangan+pupuk+organik+cair+pdfPDF 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_off0000d283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD283 10956 bytes
SHA-256: 98d5ee3f2998804631aeeadf759186cda24571684e1526b0969ad22d0b3aa0dc
font_01_sfnt_off0000eb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10369 16216 bytes
SHA-256: 56adacd25da5fa969e1c0d7b4c640ffdcf393f0667d2f3f146d822bc4e21d8d5

Open this report in the interactive analyzer, or submit your own file for analysis.