Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc179ff4ab6c363b…

MALICIOUS

PDF

78.2 KB Created: 2021-04-06 00:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 87cfa0319ed250407403a51a91da0a47 SHA-1: 308dd164e4518d8b9254a53bb778b6f9cd0a9ab8 SHA-256: fc179ff4ab6c363bf05e74e7183d0b656822e3f8711dcfd794863905d5bcff4e
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'botokaw.ru', which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to 'quotes', which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=the+young+elites+quotes+with+page+numbers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501208/normal_604b165c269c8.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/MKhbhiv/automation_machine_builders_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/nufomewo/ijrjhAR/nifilawasajowovejadesefux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480899/normal_605dff88bf217.pdfIn PDF document text
    • https://cdn.sqhk.co/bofilewidil/hamjgP4/danukavalepuvopulifanemaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483867/normal_6051af2656172.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/eMjapjb/football_coach_freddie_roach.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/kala_patthar_movie_amitabh_bachchan.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/gfehfED/6518693942.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_5523946eb72f40198cb28c23b4b59972.pdf?index=trueIn PDF document text
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_90f4c451248f46e98ac33694477d1fd4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6ca645-01f6-47cd-946b-6396222c5771/kidufejuru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df645c5-3456-4fb1-9d78-ea4a391e69c7/boy_scout_motto_always_be_prepared.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27193cb0-fb94-41e8-b471-62abd73ee384/zosodorunebogakuvinona.pdfIn PDF document text
    • http://xepatodop.onlinewebshop.net/coaching_ontologico_profesional_oscar_anzorena.pdfIn PDF document text
    • https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_456ae60b6cfb47379ddcb82d6ce41344.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_984987fbdb334ad9914b37d11ba77f50.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd044fc0-278d-435f-96f1-93d276013dab/40603981192.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/xufoli.pdfIn PDF document text
    • https://abf133a7-37c0-4616-b653-d99fd306bce3.filesusr.com/ugd/5c8236_00bf47cf493746eca4dbe459aa20d00d.pdf?index=trueIn PDF document text
    • http://dinoxisajuz.rf.gd/30478559924.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_off0000f132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF132 5644 bytes
SHA-256: f59bd089da3bf52d8622f7fbff0be7bd7cfc6753608e81431bb363e06f39e027
font_01_sfnt_off0001044a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044A 10964 bytes
SHA-256: 7dbe061d672515ef77ad7c53e3a2397ea4e0a7dfbb3645a65abf43ec6d15a3c3

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