Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee347f21f60abe8…

MALICIOUS

PDF

78.8 KB Created: 2021-03-10 11:55:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 11ee728683f068719b5a5dd67e088ce4 SHA-1: aedead1dfc5a1aff9b93e10b071a9e2f52346952 SHA-256: 2ee347f21f60abe864bdc4da8021b7b3d6b901ffe7cf8ad314e871e62a28d3c4
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. The heuristics reveal it functions as a link farm, containing numerous external links, with a primary URL pointing to 'jottigo.ru'. The document body, though heavily obfuscated, contains references to 'V for vendetta movie free', suggesting a lure for users seeking content. The presence of multiple external links, including one with a 'utm_term' parameter, strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=v+for+vendetta+movie+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425933/normal_60137c52d2e2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379369/normal_5ff5093a1161b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_5fe7763f516e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476148/normal_5ffc13b838445.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/gjbjia0/royal_splendor_blogspot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443610/normal_600b9a864cb2b.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/V0gjQFB/totally_epic_battle_simulator_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502817/normal_603f28d194a67.pdfIn PDF document text
    • https://cdn.sqhk.co/lowixadoges/hghiXjj/9338032658.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/YhjZheW/809135936.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://uploads.strikinglycdn.com/files/bf31d806-625f-4f6c-8dc6-94bb9979fc8a/10974752129.pdfIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_a85bb88ba6414a95896f32efceb9e597.pdf?index=trueIn PDF document text
    • https://ee42ee57-4547-4a8c-8a66-6cccb7f6869d.filesusr.com/ugd/2a9ad2_5acf7344951e4e6e84cac70a7daa9538.pdf?index=trueIn PDF document text
    • https://56f9ebfc-1b58-4ccd-90b9-24793863e956.filesusr.com/ugd/0f3536_cb130333b0be45afa6936d62cbe15494.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69c3df67-c5ca-42c1-9eb7-6449542e7d84/18576190082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95872af3-3341-45e5-bb66-093c6312ae77/fazezevagiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c2cadd-3555-4f5d-a1d7-4b2cb343c754/8847515536.pdfIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_0e459c0aec0744ae8c738aeef8832b91.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a643987a-5f13-4014-9682-3848c851ea7f/hobart_meat_slicer_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cecd594-71c3-45ef-9d87-faef9a8ebba6/mopigazozavurubedezilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c89ba4e-1b5d-45f7-8825-a5898406facb/zekivesefow.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_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 4656 bytes
SHA-256: f3c706c9385ed0b001df3bb6c8d185554f0ab86832f4834c1f3dd99a4b851b60
font_01_sfnt_off0000fad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 10768 bytes
SHA-256: e70ee3a0eae1184dfa983c26e474b9f53841951499d5c900e93df426de470225
font_02_sfnt_off00011fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC1 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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