Malicious PDF — malware analysis report

Static analysis result for SHA-256 44957fe4328ba655…

MALICIOUS

PDF

87.6 KB Created: 2021-06-29 14:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d16c2904d8d6181efe868565b0d8d8b SHA-1: 22cc39a0a0fb3314922ea53fe9f0bfad1585a9b9 SHA-256: 44957fe4328ba655989d159403e9fd0d841a6b6659553f1b8520195adcc52bdd
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 websites, indicating a phishing or malware distribution attempt. The file's structure suggests it acts as a link farm, directing users to potentially harmful content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/b5e877a19d776aa11f2e1755a97222a3/nujomariwimufibixixuz.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/1f7050d3b66501991ee44b53073881ae/ferufojedorabekisaxefapa.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28592d9928---bezelomo.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e126e918b---90353250090.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/j3q1ec2u16op3dltud5r67l3sg/17222721871.pdf
    • http://canhtoanland.com/upload/files/feworet.pdf
    • http://szalkasszorutacskok.hu/app/webroot/files/content/files/jifejilibasofozudixal.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ql2jfnkt3gle47iiprl7ik264k/85338933686.pdf
    • http://gfb.it/upload/fck/file/30609042577.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/33c7cd8ae3e58e6fcc823127cfc9369e/wusom.pdf
    • http://0930actress.com/files/files/tevigonexewegixipofumuxen.pdf
    • http://vitalenzyme.com/uploads/fckupload/file/xuneg.pdf
    • http://cablexconsulting.com/Upload/file/41658757692.pdf
    • https://ahha.az/userfiles/file/kelawulawata.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/gpvlqk6sg6bh33vbvukq32or60/zudotupimo.pdf
    • http://www.anclupnapoli.it/userfiles/file/64365351693.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4bc4792f4---24980741215.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099f400dc304---tufavopafetuzi.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b81de77dd---57278381818.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb6d4b9e2c---71524556956.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073eae44b571---gujekuputevuxaxozidopogis.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cda0763209---78303822619.pdf
    • http://mp-journal.com/media/file/vefadetapokifuvozawenevel.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa94b1463f---kizasenagokukuramatoki.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+the+function+of+transport+vesicles
    • 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_off0000ef94.bin
559d828f5dda37ab952b051ea6e50626b4e686b70abd4fe5922a7bac5346f35f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF94 10736 bytes
font_01_sfnt_off00010841.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10841 16792 bytes
font_02_sfnt_off00012053.bin
4a4a6fa423c52e11278e626cf9b390b2206cfe471d9c4136ecaa8de21e4d8e6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12053 17828 bytes