Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ebefc7e9f270b68…

MALICIOUS

PDF

95.1 KB Created: 2021-07-01 00:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bce1362b612e0624522921e96992edd1 SHA-1: f93ebb1adbfbec5637caef2535482dee2b527826 SHA-256: 8ebefc7e9f270b689b05d1bd75c8723bb6aea4f3438eccf0383e290bcffd53de
164 Risk Score

Malware Insights

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

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 external sites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The presence of a 'download button' heuristic further supports the idea that the document is a lure for downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/6a9404bdd40e77871c9682758de68d0e/keputoxegilazutamikikaful.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c53d55d962ae6c66f22a166a7e4018da/givatukapebovodisuxel.pdf
    • http://goldnumber.info/userfiles/file/xuzifuvarafenikakupon.pdf
    • http://hrudolf.com/userfiles/31100781924.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608538411bfd1---20775174430.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964b6351104---fajisevufikidovelaxibupoz.pdf
    • http://ahcxdq.com/uploads/file/03081229689.pdf
    • http://poltinik.ru/userfiles/file/ziwovirefije.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ba3a6e196---19985839144.pdf
    • http://erdivigado.hu/userkepek/file/89971044049.pdf
    • http://kezmosas.hu/files/file/23706566330.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/b2355a5dca67b5299a3bd4bc3ea79a64/xudavugofirawa.pdf
    • http://d4scanada.com/clients/8/81/81a8d3ecf29e0a7d9042e8364394d873/File/39216881066.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2f468fd05be689b3a022d81fa5e82009/56723884863.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/42419873059.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/13666a6bb6e79c8d0c9be2a872d703c9/gutowawi.pdf
    • http://18554080.com/userfiles/file/taloxunuja.pdf
    • http://aarogyamedico.com/userfiles/file/39077961794.pdf
    • http://kovacsoltvaskerites.hu/images/file/tifefosigob.pdf
    • http://hungbuloon.com/media/ftp/file/85848958265.pdf
    • https://powermailer.in/userfiles/file/51219080067.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=dc+dutta+gynaecology+8th+edition+pdf+free+download
    • 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_off00010b2e.bin
759ad48a42713d10ec418af4dc2e6abc2c4c913ce5a13b15098f216a3844dc42
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2E 18872 bytes
font_01_sfnt_off00013b21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B21 16792 bytes
font_02_sfnt_off00015338.bin
8e4832af497debab8f040cd608c3c466d1f9a5c8d05d7043aff575c161b380c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x15338 11240 bytes