Malicious PDF — malware analysis report

Static analysis result for SHA-256 049500140a75f7c7…

MALICIOUS

PDF

71.1 KB Created: 2021-02-12 04:36:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: cfa6e2772fdd1a0ba36c872d509720ac SHA-1: 089528e3ea8195923794704b4658cdb589755a7d SHA-256: 049500140a75f7c7c82d54b9be8face79c1facf2c082f725adbeaec31a6ca868
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to link farms hosted on disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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://leonvi.ru/wix?keyword=norlund+axe+paint PDF link annotation
    • https://cdn.sqhk.co/xevowuto/x3gjdgc/sandwich_shop_delphi.pdfIn PDF document text
    • http://zaxunux.iblogger.org/cpctc_worksheet.pdfIn PDF document text
    • http://fifukeluforonis.22web.org/37732229736.pdfIn PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/xawal.pdfIn PDF document text
    • https://cdn.sqhk.co/tikikizeveni/j1jieib/90387455757.pdfIn PDF document text
    • https://cdn.sqhk.co/bofagenined/v4hchhe/trial_racing_3_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/Mjchcgc/72396125197.pdfIn PDF document text
    • http://dofolamemudowu.22web.org/65376160733.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mulubixuzu.epizy.com/48803310235.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/82617195764.pdfIn PDF document text
    • http://sogigadataga.epizy.com/44162935905.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/trichloromethyl_chloroformate_msds.pdfIn PDF document text
    • http://lisunamubeso.epizy.com/chromogenic_coliform_agar_merck.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/tavivoxakagu.pdfIn PDF document text
    • http://leperipuf.rf.gd/rolutewolovopujejipex.pdfIn PDF document text
    • http://sazosubegus.epizy.com/ccna_2_lab_answers.pdfIn PDF document text
    • http://mudefikireneb.rf.gd/kidimisek.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_off0000dbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 4812 bytes
SHA-256: 51fc2190d5a96a4d8255a6da56b27d184096ac4504851b65f1c6fc67295a7aec
font_01_sfnt_off0000ec66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC66 10288 bytes
SHA-256: 743623ac85ab8967ac2ab5673c20af510d3dc31b1757afacbae0b56ecd2ca7e5

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