Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae53b728e37b650…

MALICIOUS

PDF

72.3 KB Created: 2021-02-06 11:23:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 354e38b2e5421beb91319f0b35bf615e SHA-1: d7b9129e17ae61cf11742a8d05b13fb813c24219 SHA-256: eae53b728e37b65036bd72df0fcd52a354f3485339c7524446e2b493bbc5a0cf
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous external URLs, with one heuristic indicating it functions as a link farm on disposable hosting. The document body, though heavily obfuscated, contains references to 'soccer head soccer' and application metadata, suggesting a lure to external content.

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://seumenha.ru/123?utm_term=soccer+head+soccer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368975/normal_5ff40148be4f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410703/normal_6005c6f5064ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461748/normal_5fe55b4961038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409236/normal_5fdc3b285ca66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470687/normal_60015e0493e47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456121/normal_5fe74218acee8.pdfIn PDF document text
    • http://gedawirij.66ghz.com/xonesugosexowofugimemonu.pdfIn PDF document text
    • https://nulaxevaximuji.weebly.com/uploads/1/3/0/7/130776814/557e702a0.pdfIn PDF document text
    • https://bogigusojuvifu.weebly.com/uploads/1/3/4/3/134316749/b5fb93afe58de3.pdfIn PDF document text
    • https://temisufe.weebly.com/uploads/1/3/5/3/135384001/pegexa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375504/normal_5fcc23547acfb.pdfIn PDF document text
    • https://zutosexumapa.weebly.com/uploads/1/3/1/6/131606298/pigozanekidef-molusatowo-sazipemefona.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374181/normal_5fe063fd02129.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dewelimu.epizy.com/87349764197.pdfIn PDF document text
    • http://nofifejagarenut.epizy.com/anime_landscape_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/esma_mifir_q_a_transaction_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/make_custom_cheer_uniforms_online.pdfIn PDF document text
    • http://ganesuk.epizy.com/ireport_5._6_not_starting.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_off0000dfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC9 5100 bytes
SHA-256: 0ccd17661381ca85d51e10c23fe0a6d68dddd6f1acb184dc7f0f2dadde10bffc
font_01_sfnt_off0000f115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF115 10408 bytes
SHA-256: ad3d457c5e2e75768eaca4cb94912836a142910af7f12e9257447991176a8038

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