Malicious PDF — malware analysis report

Static analysis result for SHA-256 9038e6bd2b9df781…

MALICIOUS

PDF

82.5 KB Created: 2021-09-01 04:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0a7052535f323e84e57cd04f15cb0331 SHA-1: 1a2aa26e9769e22bfa18973f011922a34872bbc3 SHA-256: 9038e6bd2b9df7815ef965fc8a120e57e1d0b7d4c77810305b28ef30055d0e33
176 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, potentially leading to further malicious content or exploits. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document's purpose is to trick the user into calling a fraudulent number, consistent with tech-support scams or payment fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607919ce17833---87194053232.pdf In PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bd20819a9e---kupivopuzawevedeze.pdfIn PDF document text
    • http://munsusa.org/userfiles/file/20210819223520.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/53213205046.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/jadijumivumom.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0a4262a91---18776470475.pdfIn PDF document text
    • https://mytopics.it/uploads/file/99180160579.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160afb3c18d6df---76042795086.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082b72f71062---42107079152.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/redirupedabeju.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/52561568847.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/veguniris.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a076e93a567---vawexututipewilikamotinam.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/giwokaweliwubinibovafo.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1440780ab1---regewoligawifiloto.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/5pdq50f8av1hc1sofg7pt469p4/61084536350.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/foxafuxurozunutuvabex.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/sumigubojikalexutadi.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/63409219679.pdfIn PDF document text
    • https://scapetime.net/images/website/user/files/bovut.pdfIn PDF document text
    • http://noithatnhapkhaugiasi.com/luutru/files/95574485272.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=south+toledo+bend+state+parkPDF link annotation
    • 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_off0000dcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEF 18136 bytes
SHA-256: f842b6ac484ffe288cc39088c29cedcc713f3adc1c006a0af3edf3d37cc71788
font_01_sfnt_off00010c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3E 10804 bytes
SHA-256: 2e2b37b0f5937a9ab60f24f4845a09bca61ccedc32ddbbb4904c075830d654e7
font_02_sfnt_off000124da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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