Malicious PDF — malware analysis report

Static analysis result for SHA-256 b32f04c2feaaf6ed…

MALICIOUS

PDF

89.5 KB Created: 2021-06-27 06:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d1f39af7178be5afe93f592ef4bbfa9 SHA-1: 3e1421e2d5ef372290fb33f0f3761cda8c7c989d SHA-256: b32f04c2feaaf6ed0788ed63a13f4075a444c95dd5960c681561c913a5e8d8b5
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories. These links likely serve as a distribution point for further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb670dc73---41590951098.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a46d44b07---90435495292.pdf
    • https://aashianarealty.com/file/47790089814.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/38b56e202468c755de829a492e49dc55/tanutese.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/0b03258f510b6a9652f22d638844d18c/46271100706.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ipibfkcldqlos88assev5inchm/mutuxesusevexisi.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/38qa6n6ltugo7jn9n512rpb8gv/nozavizodusuxurunu.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/abc597c7df72fa8ae8076dccdd2c57e5/zenog.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfa5e7b367---9690021299.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16080998dabb6f---23389044451.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/3mci8tso10bt7o43ov0sa2cc7l/pesaduborujijetike.pdf
    • http://conomiya.com/images/uploadedimages/file/44304739824.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/vl5e83jtv0ld1h3222prdt8s5c/kodut.pdf
    • http://dyglas.com/userData/board/file/65325660422.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091b6509ab71---12066613543.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16070052675024---64842326943.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7fa4521bf---karuzuzodo.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/g00runhq39k3l2bi9o57ji23ll/pawopelo.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/a1425e4cf97034f5743213813b533196/kazamag.pdf
    • https://coastalstudio.com/images/main/file/riwizafazapesafira.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/9b36f7e14fa391c4c6becf1a27fed7a4/22359006512.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/rueidijuoj5d35bu1rdmkal80f/20637499733.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/238204e24c07bf00af293b365e5209c7/bozubomulawijenugobo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=different+types+of+manholes
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdb5.bin
8228bc44764505fdb9b31d49bd0f2f1fc53535af97044ff020e495ca9cbf188d
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB5 16364 bytes
font_01_sfnt_off00012829.bin
54423d06902d7bf4c34c57e95b9b863d5e4bebb6318c3add8d40d582098de759
pdf-font-stream PDF embedded font (sfnt) at offset 0x12829 10736 bytes
font_02_sfnt_off000140ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x140AD 16792 bytes