Malicious PDF — malware analysis report

Static analysis result for SHA-256 d920def889c9d258…

MALICIOUS

PDF

74.5 KB Created: 2021-02-28 13:48:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5743970049896551b6e007a4c92fe00a SHA-1: d2ceb518314885c37b568ba3f2f04adadcdf5332 SHA-256: d920def889c9d2581f776c47b3a1410c368f50fd44998482c8162fd7245be399
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm used for phishing or malware distribution. The document body, though heavily obfuscated, appears to reference a service manual, a common lure for social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=john+deere+450c+dozer+service+manual PDF link annotation
    • https://wutekeli.weebly.com/uploads/1/3/1/3/131379380/ef50f16e0fef8cd.pdfIn PDF document text
    • https://tumurotijom.weebly.com/uploads/1/3/4/5/134512141/43a83c8803830ca.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/Jgighgf/47837111717.pdfIn PDF document text
    • https://tiwamufeg.weebly.com/uploads/1/3/1/8/131871705/7c7086782.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/ece5530ae6759.pdfIn PDF document text
    • https://cdn.sqhk.co/juvadujud/chH2hmf/lopigavokutuposujixelarig.pdfIn PDF document text
    • https://cdn.sqhk.co/poxofufiko/hSChcib/jeu_bounzy_2.pdfIn PDF document text
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/e5737306141.pdfIn PDF document text
    • https://cdn.sqhk.co/bokapapukopa/aifSFXG/pemavetixabegitazevur.pdfIn PDF document text
    • http://bepufuz.22web.org/63928119795.pdfIn PDF document text
    • https://nikulagoronol.weebly.com/uploads/1/3/2/3/132303117/xivemorazuvima.pdfIn PDF document text
    • https://femerofuvarilef.weebly.com/uploads/1/3/4/0/134012326/dilebanejuwunorixub.pdfIn PDF document text
    • https://wirufaxiferid.weebly.com/uploads/1/3/4/5/134599318/5706601.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/sXDgggh/26531224448.pdfIn PDF document text
    • https://cdn.sqhk.co/sawowudin/UhI9Di1/sudiwomexujuxigijojasex.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/dorulusof/10126122746.pdfIn PDF document text
    • http://duxuramubot.epizy.com/lemunabodexadezisiwisup.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/gamukadexetuta.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_off0000e4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DB 5632 bytes
SHA-256: 42982e665ed327c53cc5d672f886adaab2f0ce3819812b2ccceb0e44c79c9dde
font_01_sfnt_off0000f7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EC 10588 bytes
SHA-256: e36b35a62597b3e88c80de03aaea8fb86a728ab67e185c907c3de631b6a6ffb3

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