Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0deb746e68b1dfb…

MALICIOUS

PDF

109.2 KB Created: 2021-06-19 16:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4e2a06748664e80c8504b5358493711e SHA-1: 4e2eb83e9339b8b8d9dcf5e6dc0d0bedbe1e47ab SHA-256: b0deb746e68b1dfb0b4edb3511bc6b230992dfb1550cb0c071fd469a235566f5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting it's part of a link farm designed to distribute malware. The document body, though heavily obfuscated, appears to be a lure for downloading game ROMs, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zuche0551.com/upload/file/lotugudatitoj.pdf In PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ea83a317f---30391147053.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/sawarexituli.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a98dbc56b1f---kenikatazatudaferelaga.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a93f23428---86833947043.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/f07171606f8a5ce5be2276758fd3d174/mopunun.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/31390619408.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/ramekupokafugagot.pdfIn PDF document text
    • http://usmleworkout.com/files/file/406865419.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/fajasofu.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/h6qk7kcr82govemtnq01q3i03s/xakuluvokagulebolunev.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/3a04daa4d108cf6b63cd6a5679d053bf/xasuvaligarawepugufikibe.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14d0bd1b40---tepofusabazoxa.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/ig9bknovffgn9l1v5qrm8pb078/gufugesawij.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608a34c2977e7---gijoseduxopepiru.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/kikubiweropalizotepufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+legend+of+zelda+phantom+hourglass+rom+downloadPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000137d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137D0 15808 bytes
SHA-256: 5f139de25bba2b3e34f6740b77c324722082153fd812d9aed120873a38d9f8cd
font_01_sfnt_off00016ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AD0 5548 bytes
SHA-256: 8e50191f26d963667c4d42b9220a85a2bfed2b0da985dc69cf8fd2a375655b09
font_02_sfnt_off00017da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DA0 12828 bytes
SHA-256: b43bd5fffeb027beac346e49fc9599181a45c9e52daa890a79bd1e18c96e0339