Malicious PDF — malware analysis report

Static analysis result for SHA-256 f24bc26b0bfe1eab…

MALICIOUS

PDF

70.0 KB Created: 2021-02-28 10:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2e463ba428b1eccec1e3a39d2b05aecd SHA-1: 0386c100b331e28a68241dc6e9c4c1e2ef69150f SHA-256: f24bc26b0bfe1eab1eda06dd6d6cd8e5146a189143642592496b2f7a84f099e8
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with a primary one pointing to 'seumenha.ru', suggesting a phishing or malware distribution lure. The PDF structure and embedded links are indicative of a phishing campaign designed to trick users into clicking on deceptive offers.

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://seumenha.ru/wix?keyword=shark+tv+offer+5+payments PDF link annotation
    • http://onlinekartiadesi.com/xezav6hoyw.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/27016489172.pdfIn PDF document text
    • http://epaytds.xyz/vukazuvixatapikapitinokoso3v5c.pdfIn PDF document text
    • http://romeita.space/fractionation_technique7dgw0.pdfIn PDF document text
    • https://kakenemewaxe.weebly.com/uploads/1/3/4/6/134655752/22b4dd.pdfIn PDF document text
    • http://vorecan.space/ziwavaxowalazijisitekak8x2id.pdfIn PDF document text
    • http://weraka.online/materiales_dentales_barceloa8raw.pdfIn PDF document text
    • https://logekififej.weebly.com/uploads/1/3/4/5/134502341/xipaw_mubapukib_mapafabimule_lugalu.pdfIn PDF document text
    • http://naturfresh.space/58605313250lrecr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jojomuge.epizy.com/nizuxomifojikepagesobizi.pdfIn PDF document text
    • http://mosupemerumen.rf.gd/78697219867.pdfIn PDF document text
    • http://dilopopizepirem.epizy.com/4159981761.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_off0000d53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53D 5560 bytes
SHA-256: 5a97aad33a6632ee12a818857c6d677fab90f9c7d7747bb8aaad7bb37b69d59f
font_01_sfnt_off0000e80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80B 10396 bytes
SHA-256: c49ee18b4dcbc679d4c822c689fabd5a1a3db0d7db5597e0eb381ebfd9f48006

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