Malicious PDF — malware analysis report

Static analysis result for SHA-256 9264c9502ad6dc8c…

MALICIOUS

PDF

84.6 KB Created: 2021-09-06 13:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 3c5290ed9240527959d4e544423db430 SHA-1: 8f0688f277c1bbc9965751f77e9d214b2348acbe SHA-256: 9264c9502ad6dc8c84cc34c352a0ab7e3f298db451ece3f7be7cb046215dc19d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external URIs and link farm indicators suggest the document's primary purpose is to redirect users to compromised websites. These sites likely host phishing pages or further malicious payloads, aiming to steal credentials or compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://laborke.ru/uplcv?utm_term=solidworks+cswa+exam+sample+pdf PDF link annotation
    • https://pelletier-tp.fr/ckfinder/userfiles/files/genedop.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/fa3cf4bf2f185e562e212057ccd5f34d/tamijofijizuturut.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9676c1fd9---xidad.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/d9142a427acf866bee74e23f0b5854f0/nubasefibibetataduxapo.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/b340653c799a4de44a977bb948c624dc/lonud.pdfIn PDF document text
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/n0ld21qlsdo17qrb7m1re30iu4/52755603256.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16103dfce08238---sunegubagokalabeg.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607775dccfbe7---11244532219.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/fejagefaripofotad.pdfIn PDF document text
    • http://m-camper.ru/ckfinder/userfiles/files/37215936835.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/jefibipot.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727b8214b20---35549290519.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/vuzorujufaperibagazawil.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050411420998.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13365ab5e4---nelenomumasapedi.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/45595007376.pdfIn PDF document text
    • https://nadamasristorante.it/file/57442160526.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858f260417c---dedofagi.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b070451317e---4455597757.pdfIn PDF document text
    • https://hoongnau.com/upload/files/zevim.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f84d895e84---69590772987.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088354bd3853---31532976009.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/ictjpkiodbbhq3ima9jrsfrvdj/zizagudeke.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE375 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8C 10936 bytes
SHA-256: d7b68078cd8b9f7b297b918a24e3efce89555a1ec43c618da1da0457ef556df3
font_02_sfnt_off000114f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F1 18436 bytes
SHA-256: df268949abe63b5e87c848644b9c0fd04299816831381348d696a7282a9454ab

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