Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f74b8bd380083a…

MALICIOUS

PDF

117.8 KB Created: 2021-07-03 08:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cfd8aef6b571151048ac8c042adc4e6 SHA-1: f664988cf7cd8b74dedd878c9d1e9eb541f60398 SHA-256: 29f74b8bd380083ab83ed0e8238910b6de6e3457cab3b3cd3a960b069e556b18
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it functions as a link farm to distribute malicious content or phish for credentials. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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://elateridae.com/images/FCKeditor/file/57390085544.pdf
    • https://prairieroseclothiers.com/FCKeditor/file/51416458679.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/v72l9vglfncocu8ouiqimnnsl2/mowenixigeturibepu.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a470b8ce0f---56373720103.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/7c8bc98ce6ee3f827e81c5971182fe57/93888153164.pdf
    • https://fa-vietnam.com/webroot/img/files/81250771484.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ebfc0fed2---vedixojojikolaruxazetefup.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/6db26d7af670546f62465b8da359f9d4/fevoziwe.pdf
    • https://pet-fashion.ro/mm/file/xalaxi.pdf
    • http://sevoir.hu/uploads/file/xazutu.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/tc7mftlecugtmdr7vui38kbf8m/juveritudo.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc1f149662---32482124022.pdf
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/57003442825.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075eb8b5b131---10163673293.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/52bd65f7d6604e236a337f7c911bd31a/gupulejalugazazomu.pdf
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2lm5vgun95jl6d6c3t16vfol3i/zemaxux.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1339be14b---mixogelesugejiwemute.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/517bf79194beda3c64be17bee9e74d4e/1818881028.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609831568a55d---nijakekikinuminokowodumof.pdf
    • https://btcauction.vn/hinhanh/file/83252098001.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27844582f1---21319035704.pdf
    • https://ludifrance.fr/userfiles/file/34610588395.pdf
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a17e3f3ae7b---zekapuxokibikitupiji.pdf
    • https://evergreencans.com/userfiles/file/85568546142.pdf
    • http://loaamtran.vn/files/usersfiles/files/wafet.pdf
    • http://hanart21.com/files/userfiles/file/77181787823.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=book+9+paradise+lost+analysis
    • 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_off000169fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x169FE 16792 bytes
font_01_sfnt_off00018215.bin
7a0378eafd85bfe5c78c38d2fe7e96534733ab9270d31991ea95ecff79f7e957
pdf-font-stream PDF embedded font (sfnt) at offset 0x18215 10812 bytes
font_02_sfnt_off00019b39.bin
c8c35949efbdd5e816c3647f749ff272d9203b07fcf8acaf44baac8a52f48379
pdf-font-stream PDF embedded font (sfnt) at offset 0x19B39 17920 bytes