Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f0a6f61fb28551…

MALICIOUS

PDF

83.2 KB Created: 2021-06-27 21:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e09652604a71829184cd8356c0109674 SHA-1: b3fe78cfa20664a273bfbe4d82e2c83e2c037f14 SHA-256: f9f0a6f61fb285512903ddef5faf02cf2da608c9be760f093b59e20100d239f2
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. The presence of numerous unknown URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://ateliergermain.net/sites/default/files/file/xufaxolobesilozof.pdf
    • https://hanurichurch.org/ckfinder/userfiles/files/mesibazesomolo.pdf
    • http://qca.ch/userfiles/file/lasowekaraxa.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/dic8rbv0dn79n0donmjot2oq93/66394426356.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ba45472c94---bipajebixelokukakij.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84d9a2b71f---kakatajulokuvezibaberalow.pdf
    • http://flambotour.it/themes/userfiles//files/80119439856.pdf
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160a420a36b2ca---35960270474.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/5746bfb0b187294098d49de5a952559b/dirulegud.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/df4e9p6qjiibsq9ur21ptqsok0/matamage.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a632750a288---gunuwap.pdf
    • http://www.aportecnica.com/imagenes/editor/file/sakadela.pdf
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609561a4a0afa---80534461137.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/8mfer8fb7ej56vakkmg8m1f40o/89769223803.pdf
    • http://imhkayseri.com/resimler/files/6514854554.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608437c16a13a---sivowonosomuna.pdf
    • https://zanhotel.ro/beficientconsultingFiles/file/8280161437.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d503e504ed5---migagewinemavorin.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be279a0ab01---16256308207.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d4caecc27---89626863917.pdf
    • http://www.ez4parcel.net/upfile/files/2021/06/17/98321157741.pdf
    • http://neodentpetrosino.it/userfiles/files/96659095178.pdf
    • http://cravaluos.com/ckfinder/userfiles/files/59588605938.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=effects+of+gonorrhoea
    • 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_off0000e55c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE55C 16792 bytes
font_01_sfnt_off0000fd73.bin
5069c9d29e543527505ca5fe6087db60a6d915ee2b3dfffcfbbe76b9a4b37828
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD73 10460 bytes
font_02_sfnt_off0001152c.bin
26d96168738c0ca6cbc9ba89fe70bf17b1dce5664fd4f30ba239c5705132cf33
pdf-font-stream PDF embedded font (sfnt) at offset 0x1152C 16492 bytes