Malicious PDF — malware analysis report

Static analysis result for SHA-256 366e72b1a036dc4d…

MALICIOUS

PDF

72.6 KB Created: 2021-03-30 00:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc7fb4351ca400b7fc85222db0fea6d0 SHA-1: 963ad8f9aa4198939e9ee4e10b5c9bb393628534 SHA-256: 366e72b1a036dc4d431062e34646c90250f323fed868fea9ffd3b70786877085
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection scheme to host malicious content. The embedded URLs point to domains commonly associated with spam and phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=wow+macro+commands+wait
    • https://kifirazet.weebly.com/uploads/1/3/4/7/134715796/8d3ef70ee.pdf
    • https://febefadu.weebly.com/uploads/1/3/1/4/131453100/vowujabuzuwuxewitofo.pdf
    • https://static.s123-cdn-static.com/uploads/4383798/normal_5fc66c84dfe80.pdf
    • https://cdn-cms.f-static.net/uploads/4448341/normal_604ca26e9546b.pdf
    • https://pasazobunev.weebly.com/uploads/1/3/4/6/134670772/a9a1c70a5da4.pdf
    • https://tulopesonu.weebly.com/uploads/1/3/5/3/135318186/xejuwisok.pdf
    • https://wexabegolorumad.weebly.com/uploads/1/3/4/3/134351445/nikuwitevaku.pdf
    • https://cdn-cms.f-static.net/uploads/4481424/normal_600b6fa5706af.pdf
    • http://maporivibadiwaj.iblogger.org/97257852605.pdf
    • https://savatevadenu.weebly.com/uploads/1/3/1/4/131452836/rometovajukovo.pdf
    • https://mubaxuru.weebly.com/uploads/1/3/4/6/134693734/8b154fe878.pdf
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/darenedizek.pdf
    • https://cdn-cms.f-static.net/uploads/4368982/normal_602dec948dd5c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_efdf587dd8d44506ac715e63beae89b5.pdf?index=true
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_60f93b6450fb4f1c97b851bff47ff772.pdf?index=true
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_eccadd96e6834feaa8107a4bbf12a90c.pdf?index=true
    • http://zelobiliteriwe.rf.gd/heart_shaped_stethoscope_vector_free.pdf
    • https://uploads.strikinglycdn.com/files/376a90cb-23f5-46ae-8342-6708b67971a7/nizinimosugujimefig.pdf
    • http://sedobuxekazadi.rf.gd/99750977712.pdf
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_36bf7edf8d534c90aa489fa044f10f65.pdf?index=true
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_079cc66173a5481f8fed124d4da471ac.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b4757c35-6bd2-4910-81ce-04ca02f20bd9/in_a_decision_tree_algorithm_the_information_gain_measure_is_used_to_measure.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d182.bin
7e07f5c72bbd58afa20e7dd852ed346fccee139f15f05d43187fd81d5c0f76d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD182 4828 bytes
font_01_sfnt_off0000e1d6.bin
cb72d267995ccd921bb48a20f0575b28cd33fe35a161baef9f986b00125f644f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D6 10476 bytes
font_02_sfnt_off000105b4.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105B4 4324 bytes

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