Malicious PDF — malware analysis report

Static analysis result for SHA-256 45572904d0b0b785…

MALICIOUS

PDF

94.0 KB Created: 2021-02-20 08:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 12a2fa34e21b6eb9ee3c4693567eae8e SHA-1: 4f22292d9985d53cb0ac5a3637ab5aceef6d7894 SHA-256: 45572904d0b0b785de75f8f14e06b7bceb8cb1281d9a0d3e6aca6e1b04d06877
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, indicating an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed for SEO manipulation and potentially distributing malware or phishing lures.

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/123?utm_term=jean+jacques+rousseau+social+contract+definition PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370063/normal_5ffcc13f45cac.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/ibxjbia/domestic_courier_services_near_me_open_now.pdfIn PDF document text
    • http://familyit.info/56316564100gbuao.pdfIn PDF document text
    • https://cdn.sqhk.co/fizuborugas/gfgeFhi/namexaji.pdfIn PDF document text
    • http://creditpm.com/jawabkom_the_detailed_answer_dailypqsk8.pdfIn PDF document text
    • https://cdn.sqhk.co/kubasovusi/Okiaejj/91468063854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467030/normal_6030a151ed366.pdfIn PDF document text
    • https://cdn.sqhk.co/lopokevofoti/jiheZyT/craftsman_gold_5._50_lawn_mower_parts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463552/normal_602e63e366623.pdfIn PDF document text
    • http://it50life.pro/darasexoribepafegezofunu9sah.pdfIn PDF document text
    • http://creditpm.com/883495583bmw9d.pdfIn PDF document text
    • http://antonioita.fun/97779220921si7z0.pdfIn PDF document text
    • http://keepxufi.space/bias_fx_presets_free_downloadae0qq.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/hgmjegc/fasitulutafaw.pdfIn PDF document text
    • https://cdn.sqhk.co/venitalobeni/Cdjfagf/easy_voice_recorder_apk_mod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001342c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1342C 5204 bytes
SHA-256: 43982e3d2e62ec0d61f1f6c168e9a121f46f5629955b75d9177cca4a1054997f
font_01_sfnt_off000145f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F3 10836 bytes
SHA-256: 91670a76a46049e37a3bb384c30ad0deb3df5e723b11f7db3225309262103eef

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