Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a29aed41a4c1056…

MALICIOUS

PDF

88.2 KB Created: 2021-08-13 20:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6edacca3667ec80593b1397290497968 SHA-1: cb579a89c1f51de4380b9ab457caa52a712d2bdc SHA-256: 3a29aed41a4c10562bc359dcefd35a625ea3a422ef7a32139953ea55a2535429
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and a link farm pointing to compromised CMS uploads and disposable hosting, which are common tactics for distributing phishing lures. The primary goal appears to be directing users to malicious sites via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://eko-inwest.eu/upload/file/88691161516.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/ca587aabb07db30d3904608c99481e70/pepazido.pdf
    • https://arrayamed.com/userfiles/file/86189999681.pdf
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/m66t122ni2pg1q5ghki0lc65c4/95614719479.pdf
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/51624774796.pdf
    • http://architetturaurbanistica.it/userfiles/files/naletunizebabumilaziwazur.pdf
    • http://bielle-srl.com/userfiles/files/8387592193.pdf
    • https://happycolaborativo.com/uploads/files/79236106267.pdf
    • http://yjccnc.com/upload/files/20734194892.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/5115e467e22dad8c1b55c1eabf16a26f/64695694117.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f51781e7e6---linetik.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/72gaijeadlmc6vlaa9t9n7blek/xiluvowe.pdf
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ea3ae7e8---duxedefimopuvejavawugorub.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/1f6b555630f8e7ca647cd7dc5c3fae0e/41568186609.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f6937a1ba52---16670808459.pdf
    • http://umrllc.com/userfiles/files/pobonalurisunuvorumiras.pdf
    • https://aawyx.com/sites/default/imageuser/file/tamapu.pdf
    • http://abogarestudio.com/userfiles/file/55893816579.pdf
    • http://lesen-und-schenken.de/userfiles/files/73776789953.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b8086fd9b84---93126744134.pdf
    • https://aronabritcan.com/userfiles/file/73538575130.pdf
    • https://darshanam.com/ckfinder/userfiles/files/28683230474.pdf
    • http://ipublicity.cz/data/file/wafaziluzijed.pdf
    • http://sdds.be/userfiles/file/58547634923.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=s%C3%A1lvese+quien+pueda+pdf+gratis
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc2d.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2D 16140 bytes
font_01_sfnt_off0000f1a5.bin
5c1e3ecb95bcbdf644d11cc7f1cb637a203008877ed408dc8f32e02b9023ee4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 17708 bytes
font_02_sfnt_off00011e79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E79 16792 bytes
font_03_sfnt_off00013690.bin
7788c8c0f2e5d7cee9695541ebcaee6e86f11cabd18712dd7b68995f4e4eb2aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x13690 11120 bytes