Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a06c01d152108d8…

MALICIOUS

PDF

83.3 KB Created: 2021-02-25 08:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: da4b53df41d3a22ae23f1b17c9e892e2 SHA-1: e3f5f119c355f93db747e565616559f9493fe3eb SHA-256: 2a06c01d152108d89554176439a6b680ea8b21526004d80aa7e2d2834bd15f27
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The document's metadata and body text are obfuscated and contain references to wkhtmltopdf, but the primary malicious activity appears to be the redirection to external, untrusted URLs.

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://jottigo.ru/strik?utm_term=the+quran+interpreted+pdf+arabic PDF link annotation
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/babesopepebisa_wuwatadutakow_rikorimutenox.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/AzTgg0k/kung_fu_full_movie_david_carradine.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424630/normal_5ffe721eb81be.pdfIn PDF document text
    • http://cashbackmoney.info/66817428784cberm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_60253506d5e4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470223/normal_5fc89994aaa7c.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/gufiduramijama-jufomenozezok.pdfIn PDF document text
    • https://gojajegu.weebly.com/uploads/1/3/6/0/136050346/pifosolilegaxi.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/7HQcib3/6647518071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_601715672f30d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_601cb648aa4eb.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/cmkS3oV/goxapoxoforulonamuzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491436/normal_60143258495d9.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/CifFVhd/93132237415.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393890/normal_5fe3049c45864.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387567/normal_600918d549034.pdfIn PDF document text
    • https://lugigotaxur.weebly.com/uploads/1/3/0/9/130969655/lifunufasigededugeb.pdfIn PDF document text
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/97f05ef8a6.pdfIn PDF document text
    • http://submonster.xyz/2766293542obpt9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491433/normal_603572cf28ab0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 5248 bytes
SHA-256: 20767d9cb2a7100dc63b598362be641df5fd855c7842a7b945a662901f48f68d
font_01_sfnt_off0001001b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001B 11572 bytes
SHA-256: fbbc44215fbb556270ac7e0b5174e57ea6ea534afc5df9f124b201616e853347
font_02_sfnt_off000126e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E1 17004 bytes
SHA-256: fdeaff8a0f7536d1dc766cb7c7fb2e3464f0d390cf4d9c050e8c62d979e856b1

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