Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad8060ebffbade6…

MALICIOUS

PDF

71.6 KB Created: 2021-01-28 15:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 77ffc650adbee2977c63e668df762ebb SHA-1: 2990ee4ebd39a0bee0f0ec1f5de631a2a21c8e62 SHA-256: 6ad8060ebffbade64df93ab0141378d886e9407a073ddfded6a330e86c390fa7
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'escape room' and 'answer', suggesting a lure to trick users into clicking the embedded links.

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://bologen.ru/aws?utm_term=escape+room+answer+level+76 PDF link annotation
    • http://auto-fishing-rods1.club/4745118288g8ild.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481985/normal_5fef02e0ccbe5.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/haPif6g/88661034695.pdfIn PDF document text
    • http://mnclassis.org/johnny_joestar_outfit66s3p.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/ghhesid/minelijizadowijenijideva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366385/normal_5feb419a8c92c.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/5hfuzTd/lowiz.pdfIn PDF document text
    • http://excellent-spb.ru/radixikaxichjsf.pdfIn PDF document text
    • https://cdn.sqhk.co/metusoteliza/jfghQgj/barber_shops_near_me_that_accept_walk_ins.pdfIn PDF document text
    • http://bhd-management.space/269306593331262l.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/qgdjhja/castle_of_illusion_game_genie.pdfIn PDF document text
    • http://ranking-se.com/words_that_start_with_m_to_describe_funzfpy3.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/hbbekKw/real_followers_for_instagram_hashtags.pdfIn PDF document text
    • https://cdn.sqhk.co/zezoxomop/iegdnja/gristmill_cafe_southwick_mass.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/r25o0hb/91087345206.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/jdxhcic/business_analyst_skills_to_put_on_resume.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/zopisolipimuxagoriwofad.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_off0000d368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD368 5420 bytes
SHA-256: 80d42a8bd14323b877091d51d76018e05d91e23e3e6ac17e0a7257d1e906f6ca
font_01_sfnt_off0000e5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E0 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000ee6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6E 10292 bytes
SHA-256: afb0c62619d1be6eda55026f9072748c0439597a8360de2927c09b3e20846c3a

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