Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd29b0f97b6fcfbe…

MALICIOUS

PDF

102.9 KB Created: 2021-02-26 15:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: b4e1dcaa3a974dfeb9e7ee533a9ba5d5 SHA-1: 8349847b5a435c35efe7f4b2d5ea5ef5a31999f5 SHA-256: bd29b0f97b6fcfbec2c08640379bf80e87639a07296d1a0ea67f2b3c8276e0e4
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to service manuals, intended to trick users into clicking the malicious links. The presence of external URIs and the overall structure suggest an attempt to redirect users to a phishing or malware distribution site.

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://xezojetit.ru/wix?keyword=coleman+mach+3+service+manual PDF link annotation
    • http://janorewaxeno.mygamesonline.org/51832632258.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/iejaO0C/33194841445.pdfIn PDF document text
    • https://zitobejamowimuk.weebly.com/uploads/1/3/4/6/134623616/jirezejevefi.pdfIn PDF document text
    • https://dibalinelig.weebly.com/uploads/1/3/1/3/131380687/zujedudarepugil.pdfIn PDF document text
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/5101226.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/ohjjchj/beat_the_boss_3_mod_android_1.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/72189790964.pdfIn PDF document text
    • https://pexasojurez.weebly.com/uploads/1/3/1/3/131381046/gilumetalit_poruzex.pdfIn PDF document text
    • http://punejew.mygamesonline.org/denanulejuxidod.pdfIn PDF document text
    • http://imkl-checker.com/how_to_link_traxxas_2.4_receiver_and_transmitterceb96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gotitibekovi/adjectival_phrases_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/can_you_use_a_masterbuilt_electric_smoker_in_the_winter.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/john_deere_48_mower_deck_parts.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B9F 5088 bytes
SHA-256: ec204f9b191a6c515ca030187fbe1b6cb554c0f0fc7fc08dd915b29be083d0c8
font_01_sfnt_off00014cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB6 16660 bytes
SHA-256: 85e1cf884102f675d992ada3a908a56e3b7f5b00aed19a4f603244f81e108eb8
font_02_sfnt_off0001805f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1805F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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