Malicious PDF — malware analysis report

Static analysis result for SHA-256 479733d843847cd4…

MALICIOUS

PDF

73.7 KB Created: 2021-02-28 11:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f5509f9c152446bb326737b2867bb5c2 SHA-1: 9fe4c3d9b059025d11a135f8ded016256b95ec8f SHA-256: 479733d843847cd4a8fea84a39f0c212e321aa2694a18e0ef8e6c103c92c0927
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=what+is+the+theme+of+the+story+the+little+match+girl PDF link annotation
    • http://nezowigivomi.scienceontheweb.net/18911083206.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/california_residential_lease_agreement_2021.pdfIn PDF document text
    • http://silvanozito.online/online_bill_check_sngpl67eqp.pdfIn PDF document text
    • http://legendnat.space/how_to_recover_from_scoliosis_without_surgeryjw2dn.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/jhjgeic/joker_images_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/G3OehbJ/business_travel_planner_excel_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/4gjmThz/rom_installer_without_root.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/gta_4_release_date_check_activate_manually_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/pifizumux/QUxqYjj/61385808654.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/jazofadiroxenelilikiro.pdfIn PDF document text
    • http://allrecipes.pro/563244849585xtew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/zapijujetuzewojobidovuku.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/tj_yeldon_injury_report.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://scripts.sil.org/OFLIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE265 5412 bytes
SHA-256: 93a53a4d994b09ad520ab1eca28c8053063e9dc3833428c9ffed3d4f2d4103f2
font_01_sfnt_off0000f4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B8 10884 bytes
SHA-256: 0c24f8a23f3aa919e9c5615f8b809a58ba0ab8ddcba1d33736955f917a453ee2

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