Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12eead77ed8f648…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 02:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 694e92d06a616b47f7a3ad4562f5c697 SHA-1: 583e0ac85afc6226188a257c40e0b621c55ff02a SHA-256: c12eead77ed8f6481c71f7226eb505594335571a165d08269827b592881339e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to lead users to malicious sites, potentially for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://bellsazshihtzu.com/clients/878694/File/fafinak.pdf In PDF document text
    • https://ibexquimica.com.br/ckfinder/userfiles/files/87832440381.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/jagufoj.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/fapatevovadifulijanugago.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/susedidesajibunawo.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/62129472632.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607244c1ecd22---68999802765.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/gaxonubanavuditajagik.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b633d0905a---dunutaguxinijoniwip.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/wikajofuwoluvidameda.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/f621ab77359ab943784007469aec7a69/xerupazo.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0e8b7abab---bosexiw.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/1eaf76d34642f3f7df08d48d46d8b4cc/55376642938.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f3f5e65de---favogozolarifimavepezon.pdfIn PDF document text
    • http://fittbikese.hu/files/file/67259177130.pdfIn PDF document text
    • http://attlas.center/userfiles/file/tinaripepiretofotalib.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/98850957681.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/rdt3cpfdke41dbtipl7603eb5d/jiraxaxopopena.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/d6qfhjthe7pn2uq0fhff482r27/5407762346.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/fiwij.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/warorevatuvidesokikobe.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/91852948907.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/98706244454.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///68243672095.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/3gkdgile3a66bmcrlicnkphssb/29451550344.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=shoe+in+forPDF 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

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_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 17952 bytes
SHA-256: 2a88e6de26aeeec981be06fef67fb59423e81d5e257e8f8acebd6e2a6ca236ed
font_01_sfnt_off00010f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F95 9912 bytes
SHA-256: 05d57e558e896cf060b2e73bd4eea4224e8b743886e162ed871d4aba24868369
font_02_sfnt_off0001255d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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