Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bf30ec9726bd4a…

MALICIOUS

PDF

82.6 KB Created: 2021-05-02 18:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 62eaa01a588f4c3a9d66429f692e1cb3 SHA-1: 2bb78d9fd2f7c3c1120d4557bb919d8d0482e74b SHA-256: 64bf30ec9726bd4ae641052d17fd96b6e0a7da15a28f30922dab94328e648f2f
186 Risk Score

Malware Insights

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

The 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 SEO manipulation or to distribute further payloads. The embedded content, though heavily obfuscated, appears to be related to a '2500 calorie indian meal plan for weight loss', a common lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=2500+calorie+indian+meal+plan+for+weight+loss PDF link annotation
    • http://tublitalia.fun/4338102339895w1j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376127/normal_60683d682dddb.pdfIn PDF document text
    • http://bigpleasure.ru/izotope_ozone_8_manualegh60.pdfIn PDF document text
    • https://wazaxilam.weebly.com/uploads/1/3/4/7/134726650/7a15f80f2ea7a5.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/koruvabifijusinejide.pdfIn PDF document text
    • http://electriccannoz.club/263323275069mwbs.pdfIn PDF document text
    • https://miroguwitofenev.weebly.com/uploads/1/3/5/9/135958286/1567d5f379f0e9.pdfIn PDF document text
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/kobozodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450517/normal_603a1d8f661c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462046/normal_6066da8f77570.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_23815448574f46eab87ffe8787ebf255.pdf?index=trueIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_4520c76b47bb4c4dad3ad29e96fbb45b.pdf?index=trueIn PDF document text
    • https://bed2724e-b6a4-42c6-a365-5b2dc6a82e2f.filesusr.com/ugd/9f087b_ee3c45c724f84eb5b58126c67f0c0144.pdf?index=trueIn PDF document text
    • https://c1cb471f-fc5c-4ef2-b3e1-4d0d0d09d135.filesusr.com/ugd/cc5b41_2e0e7b272d7141d3a793911ad481efed.pdf?index=trueIn PDF document text
    • https://fb7bf4c5-056f-4058-a7d1-073478569b53.filesusr.com/ugd/d90490_e6b8f5ce99b54d3eb314f12c889759a1.pdf?index=trueIn PDF document text
    • https://041c2bdd-267b-4995-9d72-d071cf2c2b2b.filesusr.com/ugd/ba0b69_d0a8b768e03d42b3a5c27cfc84bdefb7.pdf?index=trueIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_30a90f19e06e4d35b189f4c1ca709923.pdf?index=trueIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_8344dd06b8814e79b0b3326e411bd720.pdf?index=trueIn PDF document text
    • https://700ceb37-22d2-47c5-9888-d858af679aee.filesusr.com/ugd/c345b0_adfc42d589bf4e278d10b942f14fe0c4.pdf?index=trueIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_37ad9861ab1f4e4e8d898a89e7ebeb10.pdf?index=trueIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_abe36ca7fce140f186fcc3d3cba4945c.pdf?index=trueIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_391c5255ec9f48d9b8f70d4065c080ff.pdf?index=trueIn PDF document text
    • https://502e425a-54a0-4661-a3e6-c6e116bdb13d.filesusr.com/ugd/10da26_461024f060e54a10ad256eb9611f8646.pdf?index=trueIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_1838aa7ceba24166a3634ae8b9dc289e.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10301 5964 bytes
SHA-256: 231cf9aa3d5c7f009afa151ff53ae5335baa91559ce4dffa702245d44e2198ef
font_01_sfnt_off00011734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11734 10888 bytes
SHA-256: be396fe695724ade788d3f4db30ab3197e9dfaeaf9b096782051127156dcecd8

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