Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8af212cb39653c8…

MALICIOUS

PDF

69.5 KB Created: 2021-06-01 13:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c6692fecdc2ee68fa9d131045131cdb5 SHA-1: 6df32c217ec2ede10e294c82793cf589ec9d4f75 SHA-256: c8af212cb39653c8da4a665954983fa114a24b9125008c6b5f47568469789a6a
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm, directing users to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the overall structure and URL suggest an attempt to trick users into downloading malicious content.

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://garglob.ru/pbw?utm_term=dil+se+dil+tak+female+song+mp3+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414873/normal_5fe8425d07cc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387054/normal_6035c6f6ce0d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485702/normal_60490319f0746.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495409/normal_5fcff6c55c7f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461497/normal_600eac4333b5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453721/normal_6047b08812b19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465543/normal_5ff5d57a6f0d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485821/normal_5fe2f1770e9b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474170/normal_604a49ef27688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421218/normal_5fd19d6594025.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a564c135-f090-4a09-a251-482fb0f3d42c/high_fodmaps_food_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecba9ff-9e59-4cbe-8b6d-edadd7639938/jitukedasos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e77dc8e3-834e-4d42-8c6a-519daf3684a4/pretty_little_liars_season_5_ep_2_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b464b6d1-c70f-48a9-8a7c-f7a4814d5ec0/pumozalajawa.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144437805/multiplication_tables_till_100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009f6680-4171-47a1-ad8b-9e4a1be6a6be/kakavolutuzuwibakoz.pdfIn PDF document text
    • http://pobonagul.pbworks.com/w/file/fetch/144455733/how_to_hack_8_ball_pool_coins_and_cash_in_pakistan_on_pc.pdfIn PDF document text
    • http://negaboxa.pbworks.com/w/file/fetch/144453336/manual_for_ge_profile_dishwasher.pdfIn PDF document text
    • http://veweran.pbworks.com/w/file/fetch/144434595/sudulalajuminosi.pdfIn PDF document text
    • http://supatibu.pbworks.com/f/current_medical_diagnosis_and_treatment_-_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F9 5584 bytes
SHA-256: a0406f3f675e0de60c3480e643514653c79fe7cfcec9b1ea7ef27658ee8c2f20
font_01_sfnt_off0000e50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50C 10400 bytes
SHA-256: 7f8ec50d716d43bdd3531f9eada49de9261f9c4d7c5c5bb3aa200ec2ee6613bf

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