Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fe44c68cd5cbf6…

MALICIOUS

PDF

92.6 KB Created: 2021-05-05 15:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 43a0b91d810c44cb50844b4c0213ee95 SHA-1: 2f272136024e28b63c491b1539f2d8608916d301 SHA-256: 93fe44c68cd5cbf6f7149552b938f04868747205ac4cc46d46658c274bfb0257
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/strik?utm_term=taurus+millennium+g2+laser+holster PDF link annotation
    • http://fomizedo.iblogger.org/adobe_indesign_tutorial_interactive.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_605a8c2eac804.pdfIn PDF document text
    • https://cdn.sqhk.co/sisagoku/egi5ig7/freeze_panes_excel_mac_365.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_601726735c9f0.pdfIn PDF document text
    • https://gefobivuvevu.weebly.com/uploads/1/3/1/3/131380717/fakivukof_jideto_viben_figetomenenolo.pdfIn PDF document text
    • http://mizejodaf.mywebcommunity.org/kuvekagimovex.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/GhhjfDL/hexion_chemical_louisville_ky.pdfIn PDF document text
    • https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/weragokijinuwarumewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_603fb092285c2.pdfIn PDF document text
    • https://cdn.sqhk.co/jutigurotow/gghfKw1/picsart_animator_gif_video_para_pc.pdfIn PDF document text
    • https://takazomidiki.weebly.com/uploads/1/3/4/4/134470224/dukota.pdfIn PDF document text
    • http://lupuneruw.iblogger.org/82899022089.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/4hiPQji/11433330738.pdfIn PDF document text
    • https://zorimogitew.weebly.com/uploads/1/3/4/4/134487520/wuraxidewetuki-soxubopajobiri-muparexibu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5fe358bb83794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380540/normal_6022e28a860cd.pdfIn PDF document text
    • https://sedugewevazan.weebly.com/uploads/1/3/4/2/134234752/gebokoluwejeke_koginavugiz_bebumuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xekazaz.myartsonline.com/carlill_v_carbolic_smoke_ball_case.pdfIn PDF document text
    • http://sepenoneregepe.rf.gd/lodevozuvaxusakogix.pdfIn PDF document text
    • http://pezedavepajizum.rf.gd/rilokujepoji.pdfIn PDF document text
    • http://wavuxab.epizy.com/insert_watermark_in_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/16826756184.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/how_to_pronounce_korean_letters.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_off00012924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12924 5180 bytes
SHA-256: ff83384e8359d9f0641fba4e2b7a029258a21d59d0f1fc5b776323c6f46bf784
font_01_sfnt_off00013a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A97 12580 bytes
SHA-256: 93ef989b9e6b1d3a0cb8f218ab83b0ef49215332f3bdb355ac7d7fa9b2816405

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