Malicious PDF — malware analysis report

Static analysis result for SHA-256 29182d8b2de5a0d1…

MALICIOUS

PDF

93.3 KB Created: 2021-07-04 07:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16bf3475e0ba2127e6242a54ea26b42f SHA-1: f750519868914205a71fbe1d1730e7527e60ff84 SHA-256: 29182d8b2de5a0d1ea7f3df2317ae40049ef8e5a6528d6289e8096a7fcfc19bc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The 'SE_INVOICE_LURE' heuristic suggests a pretext for the user to interact with these links. While no scripts were directly extracted, the nature of the links and the ML classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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 https://jotekonybakterium.hu/userfiles/files/49992092557.pdf
    • http://renovator.cz/files/file/70604716916.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2f45554a1---buluzirawag.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/0a11abed2a16952b1655319fd5053734/41465744465.pdf
    • http://ongnuocdenhat.com/upload/files/moximopig.pdf
    • https://gulfsupremesa.com/ckfinder/userfiles/files/kijigefukilopigakuvef.pdf
    • https://b2cexpressdemo.com/userfiles/file/pirapanele.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd96781598f---gomulifipikimeridodexev.pdf
    • http://s-privod.ru/userfiles/file/vabukisokotutol.pdf
    • http://antifftech.com/uploadfile/file///2021062021251383.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74f3b72669---55474574717.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160805d6d6f4d0---34457146532.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/0isfi4r4uviffjpi5c9kfa77k2/xurelimeregufek.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7b01cce1d3a8bc37c0e09bb4bee312d5/61105388379.pdf
    • http://nitexprofi.cz/userfiles/file/64026565966.pdf
    • http://baigeleather.com/userfiles/file/245565133.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/aufifgna6p4cokdfms8288pl60/98292820087.pdf
    • https://vestol.bg/files/file/gifazel.pdf
    • http://gpe-el.pro/ckfinder/userfiles/files/dukaxogapapavugud.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/047e78cf64fca5e5d00ce4953e88b3bc/63545278746.pdf
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/6a3574e8cd0a2738e423d26ac86a7f70/65457423262.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/ff43c9e6a738b5d286bf1ed2cee84fc5/87494364274.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=authorization+letter+to+collect+driving+license
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fba62ab702---85852237047.pdf
    • 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_off00010720.bin
bc736792baaf8d8c61612628e3011352fc99d7a1e3869bcfdcb0a2da0a244b01
pdf-font-stream PDF embedded font (sfnt) at offset 0x10720 10856 bytes
font_01_sfnt_off00012005.bin
7c781b41489d71348f6b730c11d1990c969974ce5ad6f643afe4bc74d9d8073b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12005 17508 bytes
font_02_sfnt_off00014dbd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DBD 16792 bytes