Malicious PDF — malware analysis report

Static analysis result for SHA-256 468746ed893d054e…

MALICIOUS

PDF

90.0 KB Created: 2021-08-04 02:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f16f26f9f662d54f06b7663afb0a537e SHA-1: eaef97e8ce4a58098d9f8704575db17558a48728 SHA-256: 468746ed893d054e3f7fe66019c4ef3cd766f7408d93dd8aca15f10e794e46fe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to compromised websites, suggesting it is part of a link farm designed to host or redirect to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0a9089067---5828093421.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925b775259e---dimukejapemit.pdf
    • https://penal-garazh.ru/files/tejuzikekumazun.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a60abcba928---fajefoneboje.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6c5e3cfb62---vipexigabakedaferazojeze.pdf
    • https://himalayanwanderer.com/himalayan/userfiles/files/91482651852.pdf
    • http://ychnjl.net/userfiles/files/39590945217.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a26c0594659---84418544157.pdf
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/b4fc789b7a2f9a306ea55d697bcf15cb/16716233995.pdf
    • https://boumqueur-edition.com/upload/fckeditor/file/40661312137.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c40ffdaf42e---riwesewifadijizofapepot.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/r7rpuomr7fd463gfaq2v8jrk3l/najusefedexibapom.pdf
    • https://castilloexterior.org/ckfinder/userfiles/files/45642759247.pdf
    • https://arhstroi.by/uploads/files/56994009824.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6b25b682cde10b9885849b7ccef5767d/bulepipi.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/52b528b5a05c2cd87862f0235e5164a7/8298593947.pdf
    • http://glotecgh.com/upload/editor/file/tavodivu.pdf
    • http://funperm.ru/content/file/tumodinuxawelero.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/aeqcd86vj3aj3mohg433697nt5/28911661677.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087aec4976fe---40675072532.pdf
    • https://pensiuneavalentina.ro/app/webroot/file/juxibewukedepibeg.pdf
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083df0c3e2eb---jizuvomug.pdf
    • http://oilmachineydy.com/d/files/68123468634.pdf
    • http://firmykominkowe.pl/Obrazki/edytor/file/926474662.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=bluetooth+driver+for+windows+8+pro+64+bit+asus
    • 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_off0000f7c3.bin
227695c7c57c2f3206c861b160ad77de572db671bcad5be2c3b6d5ad671367f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C3 11492 bytes
font_01_sfnt_off000112ca.bin
c7ad59583e7081eaa00846a36fbbf60d41fd53e1f93d5cd0f31364ff2f44373e
pdf-font-stream PDF embedded font (sfnt) at offset 0x112CA 17580 bytes
font_02_sfnt_off0001413f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1413F 16792 bytes