Malicious PDF — malware analysis report

Static analysis result for SHA-256 9244352ae74a7e0e…

MALICIOUS

PDF

78.4 KB Created: 2021-03-01 09:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: de3f60abd10edcf0ad2da5a591a31c49 SHA-1: 4e446f982d6763ba08a9fb273b3972dc226d7a7f SHA-256: 9244352ae74a7e0e218867a7395cebb24738ea24cb00dd62acc812e0f2d806d9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('soxebez.ru') that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to 'propaganda worksheet doc'. The presence of multiple external URIs and the link farm heuristic indicate an attempt to direct users to potentially harmful 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://soxebez.ru/wix?keyword=propaganda+worksheet+doc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449783/normal_6015904cde783.pdfIn PDF document text
    • https://dorenezawux.weebly.com/uploads/1/3/5/3/135383086/bekodiz-bovil-sisudomumaz.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/25658057535.pdfIn PDF document text
    • https://rubajamepufukav.weebly.com/uploads/1/3/4/4/134432722/2230938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487194/normal_6039562e8ac01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415291/normal_5fe2f80aab423.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/59664285433.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/vosinerazoledo.pdfIn PDF document text
    • http://gemofesane.medianewsonline.com/eva_luna_novela_capitulo_1.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/batisogaxasaripabuwejem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476582/normal_5fd9819c26fed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://furugavasipif.epizy.com/egyptian_art_and_architecture.pdfIn PDF document text
    • http://xaxabegil.epizy.com/kung_fu_panda_3_kai_vs_oogway_theme.pdfIn PDF document text
    • http://vonubopoz.rf.gd/zotamixubeb.pdfIn PDF document text
    • http://bakesuli.epizy.com/pitot.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_off0000f7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D7 5460 bytes
SHA-256: 58e27bcb4adca2a716269bc566bdd503c934e0fcf59ed38bd7bfc78570f22907
font_01_sfnt_off00010a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7A 10216 bytes
SHA-256: ceb2b0602110c3bef38d15b79be52e7cc605a5687f7002b5830ec5d0ed6e62ef

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