Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec93ea08ee4aab4…

MALICIOUS

PDF

73.1 KB Created: 2021-03-17 14:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 474ebfac8d2695acd78ab2ad05e885c3 SHA-1: 1a5122ef3d6ba3a6ff9d26a13c5e341329d2d35d SHA-256: eec93ea08ee4aab41ecf53e702efc7a7733eadd8949414b131e1f5e9426e597b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=predator+8750+generator+manual
    • https://cdn.sqhk.co/gudijupimeb/hbMge8S/5307289670.pdf
    • http://snt-br.ru/food_to_avoid_for_gerd_patients8327l.pdf
    • https://cdn.sqhk.co/jojewezalika/LidDs04/39137416560.pdf
    • http://thailandlove.site/bareilly_ki_barfi_movie_filmywap_hdhzffg.pdf
    • https://cdn.sqhk.co/risubibasero/gcJibgh/29651157137.pdf
    • https://cdn.sqhk.co/bemaxopig/eie7UTJ/i_wish_you_were_here_with_me.pdf
    • http://organicsss.space/futub2njie.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6c403777-3bdb-430d-a4ca-23d5788374d5.filesusr.com/ugd/e0034b_4e7d9278a9844375895a3067938b9586.pdf?index=true
    • https://uploads.strikinglycdn.com/files/81108d82-1dd8-4fc0-b069-7d9e68a75433/40607263582.pdf
    • https://s3.amazonaws.com/mefovu/forming_quadratic_equations_worksheet.pdf
    • https://s3.amazonaws.com/wemazun/chaar_sahibzaade_movie_filmyzilla.pdf
    • http://libiwozurogufo.rf.gd/78652532797.pdf
    • https://s3.amazonaws.com/bulolimepol/dinuferavakefel.pdf
    • http://demoxivefuwuvi.rf.gd/android_app_maker_free_software.pdf
    • https://uploads.strikinglycdn.com/files/0f450d94-d757-45c5-967e-08b79967f812/rugurerim.pdf
    • https://s3.amazonaws.com/boduxatavepe/california_transfer_tax_affidavit_form.pdf
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_8091650c475c4e06b579f39e0ef202f0.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc30.bin
8053f87113ed4eabb75918de18234cd263673b410faef8a78c09586f36180bb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC30 5508 bytes
font_01_sfnt_off0000eed8.bin
f07395e9c921e388aecbda58a056da4413035b25324edf53b7ed42e10621664c
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED8 11868 bytes