Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c292d37a3186703…

MALICIOUS

PDF

77.4 KB Created: 2021-02-24 22:26:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 90e2d2358e978de3d8b241e6c9aff81c SHA-1: c783d4a2bfbc702d1947304404f9ee36a44ed589 SHA-256: 6c292d37a3186703992e9cc53822ab3a2dd0c38f25cd688cd9e5d1665f33c764
126 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=db2+error+codes+206 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4405193/normal_5fdf338ddf418.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/black_and_decker_weed_eater_st4500_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/Iijhfnz/gradual_extinction_definition_biology.pdfIn PDF document text
    • http://im-marceting.site/the_cask_of_amontillado_vocabulary4xvm2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465249/normal_5feec2325e1b2.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/genonesirafutefejudiziw92wzi.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/jip8jcT/knives_ship_free_gec.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/idgihir/good_repost_apps_without_watermark.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372354/normal_5fe574e195dcb.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/remington_700_bdl_30_06_synthetic_stock_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vowonedof.epizy.com/76175984543.pdfIn PDF document text
    • http://zunuwovadete.epizy.com/vojoneruxoba.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/64583155390.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 4812 bytes
SHA-256: 95e6b1e70b812ede08a0ff8236d8e20cbe11ebff78afdba8ab779d5bcd88506b
font_01_sfnt_off0000f76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 10248 bytes
SHA-256: a2ed84189d7237e670c602f2e6331fbde5d62df56e1795458d1df778130e5b74
font_02_sfnt_off00011a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A80 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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