Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb6441f28849864…

MALICIOUS

PDF

73.0 KB Created: 2021-03-03 04:18:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 807383d0ccb9ca2463a28b82138792b2 SHA-1: 401ffc229ccee3bcefdeb6b6df03d3950b0ca499 SHA-256: beb6441f28849864ee3a70f833bdca809cfe73a86cd56f7eba1c415bb91e83b6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of a phishing lure.

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://jumiwimov.ru/wb?keyword=briggs%20and%20stratton%20vanguard%2018%20hp%20v%20twin%20valve%20adjustment PDF link annotation
    • http://tuimag.ru/fanufnjyx7.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/jcDgfjf/xodagamanufojuparapo.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxegaxujifo/ggUjiet/puzzle_piece_emoji_apple.pdfIn PDF document text
    • http://fastpeysistem.online/petroleum_production_systems_2nd_edition_michael_j_economidesdt2md.pdfIn PDF document text
    • http://stassikorskyi.com/69753120447s3vst.pdfIn PDF document text
    • http://useporte.xyz/steelseries_h_wireless_battery_not_chargingictqg.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadidizi/jqV2Jih/bifep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_601be4018a507.pdfIn PDF document text
    • https://xepinepuro.weebly.com/uploads/1/3/0/9/130969238/02f5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mesesoriran.epizy.com/pasobunaravobuwibuxeraz.pdfIn PDF document text
    • http://vijixekezej.rf.gd/raroxazekidine.pdfIn PDF document text
    • http://joretewad.epizy.com/fumiweririxelivatilokom.pdfIn PDF document text
    • http://botujovibal.rf.gd/7967560169.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_off0000dece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 5896 bytes
SHA-256: 6125dfb7abd3df5c060d211452bbbf33816f4e44225a123e1a0a52f4e5043a36
font_01_sfnt_off0000f2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D7 10484 bytes
SHA-256: 72b8b0e99551ed347968bf4fb858ec6025a9aa41b76f18a906129480768438e6

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