Malicious PDF — malware analysis report

Static analysis result for SHA-256 95482cb06ec8dada…

MALICIOUS

PDF

90.3 KB Created: 2021-07-01 11:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22c974adeb161cf0da2909ade630754b SHA-1: a28e453dd4f4ea78c452cf9b968e163a5296b95e SHA-256: 95482cb06ec8dada99aacf2c4ba256edb12275488ba70461859bb02406b7a4ee
156 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa75fd129c---65309738342.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/5c5vm369s1buuk43be6o2alp9e/xurosarevo.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a99baaeb2a5---ziloguripijuriripofa.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/415d866158321ae4c053ff8bdbd63daa/govemanuxekutenozegoziz.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1608f01cd3a5b2---92161881852.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8aac09d3a0---bopaduti.pdf
    • http://nguoigiupviec99.com/webroot/img/files/nuxaliwurezunatiture.pdf
    • http://bet-balance.com/userfiles/file/32343657843.pdf
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb74a23ec40---xipawakibilukolejokek.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/7h2o28dkd1mcnf8foeu7eu6hej/gibatesusumapagoxe.pdf
    • http://watch62.ru/files/files/gikusuzeveziragenefivefu.pdf
    • https://cafesca.org/ckfinder/userfiles/files/57140178904.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/zumuzixubogupexedemekobi.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f93a03b283---77343731005.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d54b610e0---rikufupenusozebaxukubu.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/pc268ab8heudbdr2kk6sapnivb/24213712785.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/vct5tt93hih9bcukoq57a18qo6/33866945926.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/88e792ff9c3370f12e9b3470a6826bc2/jokejeluduzewokikesida.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/2d1c093822c45652eb3fb5424d97bb9d/32142007310.pdf
    • http://netinflux.net/userfiles/file/zekupinalobim.pdf
    • http://pokorny-podlahy.cz/UserFiles/File/tazokobamirukumiwekum.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed303ebd2b---7518290497.pdf
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/9es9ri4b3e303t0picbtt6vp37/tunezi.pdf
    • http://pogotowienaukowe.com/Upload/file/12015935901.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=us+f1+visa+questions+and+answers
    • 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_off0000fd54.bin
0d89f33199feaf1aa9f9a1a40d79fe70dd2e9b9664f03ebdeaf5ed96b54f43e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 17556 bytes
font_01_sfnt_off00012b3b.bin
df62be9715f202f0b05d7e804718d19dc99dcaecc344d05760bd8a38a8ca506a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B3B 10760 bytes
font_02_sfnt_off0001440d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1440D 16792 bytes