Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a0033e02e53009…

MALICIOUS

PDF

73.6 KB Created: 2021-06-11 12:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0b39519458d3c864d8d10032779ade4f SHA-1: 191b391ad2366c0c9a1fcdff0a40bd6fc6c432c2 SHA-256: 83a0033e02e530091cc6c64190783296103346e3f1bc5834c43da7a817680a7c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://coretry.ru/pbw?utm_term=molar+volume+and+gas+stoichiometry+worksheet+answers PDF link annotation
    • https://kubazavazagemu.weebly.com/uploads/1/3/4/4/134464578/bosejodevezopufoki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450426/normal_601b78ab6290e.pdfIn PDF document text
    • https://wizejuxexena.weebly.com/uploads/1/3/4/6/134655833/kedagupon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468554/normal_5ff7ac68a9157.pdfIn PDF document text
    • https://dunulukega.weebly.com/uploads/1/3/4/4/134442930/vumebijalafug_bekazusem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382618/normal_5fdf9b702de7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_6014f1f12f7e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463809/normal_5ffa4f8f21182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_601b05ff1fde2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393180/normal_6054880f7c1d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_60459cb32e815.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470835/normal_5fc92e2bd01d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_6051dd764cf83.pdfIn PDF document text
    • https://nisolelajuzo.weebly.com/uploads/1/3/5/3/135319935/0005078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_6019b261e2f20.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bokibagaror.pbworks.com/f/define_non-zero_dipole_moment.pdfIn PDF document text
    • http://sufasujozu.pbworks.com/w/file/fetch/144656712/datowudaraxe.pdfIn PDF document text
    • http://luwivaj.pbworks.com/w/file/fetch/144517548/principles_of_corporate_finance_solutions_manual_10th_edition.pdfIn PDF document text
    • http://zixawedeg.pbworks.com/f/download_film_dear_nathan_hello_salma_full_movie_lk21.pdfIn PDF document text
    • http://nerolelupi.pbworks.com/w/file/fetch/144842328/gadidagam.pdfIn PDF document text
    • http://subazim.pbworks.com/w/file/fetch/144547797/la_la_land_streaming_australia.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 8

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_off0000df25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF25 5676 bytes
SHA-256: 1f6b8d593195dc7a2d1638bbf51dd16268208146df4442967e44b6d53eacb15a
font_01_sfnt_off0000f277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF277 11156 bytes
SHA-256: 3b5d5fc1c4fa7d613e1c5de72e016af83e2508e9a5964089f1a33e6ff57b0405

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