Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f8dbcb80f2b1279…

MALICIOUS

PDF

82.3 KB Created: 2021-07-13 02:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1955bdcb1a40646ad31b6d3171ab6f66 SHA-1: 08c36fe781e525a05a72ac04f2aaea743771fca6 SHA-256: 7f8dbcb80f2b1279017b73520929dfe94ab317c1b43f1a1197d95e8a42d6b0d9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicative of a link farm designed for SEO poisoning or phishing. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the intent is to trick users into believing they are updating payment details or bank instructions, a common tactic in business email compromise scams. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://inwebjor.ru/uplcv?utm_term=list+of+all+schemes+of+indian+government+pdf+2019 PDF link annotation
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/01eeba5dfce6449b95a1793db53e43c7/67034964498.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fa70dc76e---pofutati.pdfIn PDF document text
    • http://acril.ru/ufiles/files/riloxowojubi.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/fomumanadadetubipem.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/jimadabalul.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1fae8ce6d---nediwujanubewaz.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/7a1ud297cldcootbu3o8470doj/97902298880.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/levipanirogugosivuwadevo.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/ac9sfh9q3gh5hnntr2749k6f8r/sagimubap.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9bd47165be---jotamivagumenu.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/2dd9bf5b15247cd0a5498b9d397c6ed7/19270427745.pdfIn PDF document text
    • http://emurus.jp/userfiles/file/roxumepiner.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160778fab6b1d9---komuzopigozebokurajezad.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/67678781840.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/f0cetn275nhmrdrglk9ub9r2qc/54763815550.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc68d7f297---nepetipaduj.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/8121525459.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/30f91264fa58d598bc19783c5969061f/judoborijewud.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/f49a7c3e2801c651d38ead9b46c2184d/tefubedisa.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/jhmltkabm1ak7obopqkrlb1bns/gowerudewaremu.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af65e89f10---jizozazegufebemurutarad.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf21f760e88---14936799720.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/29c004a9c2d45edba54cb9298340f937/20823487099.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789c2040078---vabukarozukemunepotugis.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/86207933606.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC63 16920 bytes
SHA-256: f73b2eab6e66b5471a3aea73c67209c698ad706414efa9f80ffae1676b743b85
font_01_sfnt_off00010871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10871 11552 bytes
SHA-256: b2215df38b6723d43a5774e6a0fd4a73d60048f1902c0224c8007a4b06ec20ee
font_02_sfnt_off00012388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12388 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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