Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f04ddeea388680…

MALICIOUS

PDF

81.2 KB Created: 2021-03-22 05:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: de0bb8537afbfd2e07e8629e822b716c SHA-1: 59c4792b5872ec3a9f3242883636f50bc93756b7 SHA-256: 93f04ddeea388680115b49081ff8717809a5405fbd517997ed0b4181997c2b92
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary focus on redirecting users to `https://golowaki.ru/wix?keyword=manual+blood+pressure+cuff+near+me`. The heuristic `PDF_SEO_DISPOSABLE_LINK_FARM` suggests the PDF is part of a link farm designed to exploit search engine optimization for malicious redirection. No scripts were extracted, but the presence of multiple external URIs points to a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=manual+blood+pressure+cuff+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369163/normal_6022a541e4fd5.pdfIn PDF document text
    • http://kapabifidi.sportsontheweb.net/teks_barzanji_latin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370092/normal_60013612cf8d3.pdfIn PDF document text
    • http://pekefosijemibi.sportsontheweb.net/the_crucible_character_body_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418565/normal_6003c70d4496e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_5fd15aa41316e.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/xoxipefunitalinepuwimetil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470687/normal_5ffb4eb35a768.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378848/normal_5fce9f6d3608b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456369/normal_603a90ab7b7d0.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://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_5bd54ed3700b41d3a370d8863ec03982.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/poresi/metal_gear_solid_5_phantom_pain_walkthrough.pdfIn PDF document text
    • https://cfae799c-d04a-4395-b2c2-700dffd2ed5c.filesusr.com/ugd/15504a_5c13b7274c9d457fae65c2d89d4c5cee.pdf?index=trueIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_638657780e90410dad1ea3e591ee5a47.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/83118271023.pdfIn PDF document text
    • https://42172c5f-463d-425f-bc49-3536d5e9b788.filesusr.com/ugd/3e9aab_4d08c2652a6a44cfbe4200c655c9ba66.pdf?index=trueIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_261a186b42bd482889d6eb3ead697f83.pdf?index=trueIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_76ea15c61cd44f749efe0f4c6c17f380.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF343 5200 bytes
SHA-256: 85ef4b562e6b1c3774b6ca18aaf9adaaa268888a63a3a4e4f19f13ad8448a760
font_01_sfnt_off000104c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C7 10764 bytes
SHA-256: 527e3be867fbc432c25d13972ffaa2060e64c98a7527370ce1c88eff7657c96e
font_02_sfnt_off00012996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12996 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.