Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32e1bf8fb715c96…

MALICIOUS

PDF

72.4 KB Created: 2021-04-26 23:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8aaeec5b1fcc9c710a52e1a7cee7e1c1 SHA-1: f983d4a5736836f2d66a766e3a636aad5f8b2f5f SHA-256: a32e1bf8fb715c969b4580aef6fbfebfc6b5ef30be20be016805007ddbc97f42
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant heuristic indicating it's a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm nature point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/strik?utm_term=remember+your+roots+sign PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403117/normal_603d7cce94fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485926/normal_604e27993fd41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452386/normal_60140c2668475.pdfIn PDF document text
    • https://cdn.sqhk.co/mikujudo/9oKoCif/halloween_2020_costume_ideas_couples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385422/normal_5fdc731b27ea3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5ff92e543737b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401545/normal_600158ade0eb5.pdfIn PDF document text
    • https://cdn.sqhk.co/dofewijoras/ifkboZc/pro_series_drag_racing_glitch.pdfIn PDF document text
    • https://cdn.sqhk.co/dazulegug/zjaiegj/strategic_management_competitiveness_and_globalization_concepts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418171/normal_602050c33b7d5.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/geLnbie/paneretof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476147/normal_5fdbb5e8e0a84.pdfIn PDF document text
    • https://cdn.sqhk.co/tizuvuwo/Kjigfii/16578308390.pdfIn PDF document text
    • https://cdn.sqhk.co/feneradebeza/1ihhDjQ/4_function_calculator_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/wozejodes/TgfXhgq/basketball_3d_light.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/jdghUjj/gabulazeb.pdfIn PDF document text
    • http://jifosorov.22web.org/lifetime_adjustable_portable_basketball_hoop_48-inch_polycarbonate_90491.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xilibosukotijob.epizy.com/email_signature_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/peak_book_review_roland_smith.pdfIn PDF document text
    • http://futisilatixukep.rf.gd/fugopizek.pdfIn PDF document text
    • http://vikogen.epizy.com/hld_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/bikivupugagid.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/chf_full_form.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_off0000dc52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC52 5012 bytes
SHA-256: 513e06af65871aeb5e07b0d5daaaba1270f9bc6fdf38624521008313e9c587d5
font_01_sfnt_off0000ed59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED59 11548 bytes
SHA-256: 9c254f69cba6efe0a811bd372d40b0dd6192c5e6164fe9793f6bc6e806740f4b

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