Malicious PDF — malware analysis report

Static analysis result for SHA-256 c964459268ff011e…

MALICIOUS

PDF

74.8 KB Created: 2021-02-23 04:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4ff7192245be5f76fdd9a5281e9ba186 SHA-1: d8d10e892134a5e7214f72e5148f18bdc4f2f3d5 SHA-256: c964459268ff011e3121d1114e9413e9f74e8a4bff30da437e0536f91523f7ba
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a 'renaissance festival food menu' keyword, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=renaissance+festival+food+menu PDF link annotation
    • http://tertov.xyz/medicine_dictionary_hindi_downloado6zpx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375690/normal_5fff67593244b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386092/normal_5fd356471d586.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490934/normal_5ff902f920d64.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/cibjbid/fosaromofuvejalagikimid.pdfIn PDF document text
    • https://cdn.sqhk.co/lakodatoli/gfmtgjQ/32660801958.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369793/normal_5fc747b829877.pdfIn PDF document text
    • http://nat-yoga.space/gumesituwctckl.pdfIn PDF document text
    • http://pifesato.iblogger.org/grand_theft_auto_5_game_guide.pdfIn PDF document text
    • http://lollipopa.online/vatetup9hzsu.pdfIn PDF document text
    • http://verifiedbadge-lnstagram.com/cisco_meraki_dashboard_user_guidexal6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410953/normal_6034601776f95.pdfIn PDF document text
    • http://meinekarten.best/doguvawit6o5y.pdfIn PDF document text
    • http://niscourse.com/endogenic_and_exogenic_processes_worksheetdywa4.pdfIn PDF document text
    • http://repochka.site/sagatirizotobazufojig0bgc4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supoxurenabix.epizy.com/how_much_does_a_criminal_lawyer_cost_in_bc.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_off0000ea9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9D 5140 bytes
SHA-256: 3b2399f5661dba421e1a5c82f1188b3d8c67a2a31d56ac045b47f5572ed77dac
font_01_sfnt_off0000fc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC15 10044 bytes
SHA-256: 8a4fbaed8158d687e8750737ad692be213d6ccf4322c6fce0fca6acfe9a3a985

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