Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9608139a9ce1862…

MALICIOUS

PDF

69.5 KB Created: 2021-03-10 23:37:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5de6b2ba7d0923f3e7bb07b78efd7224 SHA-1: 8918b6a32db15b7c0ba41d06cd13ef678cbf81b6 SHA-256: a9608139a9ce186252260f6146499bc7ea163205868f838ba705e9394e76d8e4
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and potentially malicious hosting, as indicated by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. ClamAV and ML classifiers also flagged the file as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/wix?keyword=vupoint+magic+wand+wi-fi+ii+manual PDF link annotation
    • https://cdn.sqhk.co/fiwujumejuf/ihc2eij/nightshade_astronomy_simulation_software.pdfIn PDF document text
    • http://towexiwi.sportsontheweb.net/pagavipefe.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/Q8EihmP/puligalojepusimefo.pdfIn PDF document text
    • http://wefilevazobakeb.mypressonline.com/how_much_is_a_battery_for_a_2012_toyota_camry_hybrid.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/68260299007.pdfIn PDF document text
    • https://cdn.sqhk.co/kisudosus/hb2KiiF/12586980895.pdfIn PDF document text
    • http://dofegogojewipo.iblogger.org/pigaxumasimodad.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/waxorunujigotapa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_ee8d895a8df84b17bd54de471ba187d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/bmram_user_manual.pdfIn PDF document text
    • https://01ff271a-2d66-4e22-ac0f-a796646d2f56.filesusr.com/ugd/8d93e9_d9947779590c49539f0a4c555035cfce.pdf?index=trueIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_dcc9235ef47c4e7ebfbc97965bb52f86.pdf?index=trueIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_76f4ec6bb1c7459ab362f36989dce323.pdf?index=trueIn PDF document text
    • https://78e27e65-9996-4239-a63d-7a21722db537.filesusr.com/ugd/03f576_bff0ce967e8a4237ab968463824ca9ed.pdf?index=trueIn PDF document text
    • http://jivikone.epizy.com/nirezipewoluvanedi.pdfIn PDF document text
    • http://fezosobat.rf.gd/32982491512.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_8a4a20cada244c79be7fd8fd5800d26d.pdf?index=trueIn PDF document text
    • http://bavodokebak.rf.gd/55211888839.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_f8bd9ad8431c48028e957690bd3a7162.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dinilederu/61374660500.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/how_to_attach_kirby_vacuum_attachments.pdfIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_22bff665ca574c65b4b68511ebd4f588.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_230d76c1fde248c6b5cc8ec12a8f06dc.pdf?index=trueIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_47e97ef14f0442e6bfd41af1ac5010ac.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CD 5292 bytes
SHA-256: 46540db51d7ddbadddf0a41e1dd3ea2657738ee209c61de6b377813a04ac8107
font_01_sfnt_off0000e5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E1 10040 bytes
SHA-256: 04ef22a864f5c3c81a602bce8c555f90df23f55a9af0b656a9ac6b8d9716972c

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