Malicious PDF — malware analysis report

Static analysis result for SHA-256 e30a910a25be0e8b…

MALICIOUS

PDF

78.8 KB Created: 2021-05-11 13:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a4eb099b1af9e7a60eb38c0438fb834b SHA-1: 2ff519e06b85291f5620aa0bbb47ab5758c1ed88 SHA-256: e30a910a25be0e8bfb8614294af1cfd9d9ec549607f237799bb877f48e42bc6c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=women%2527s+air+race+classic PDF link annotation
    • https://kumazazunanij.weebly.com/uploads/1/3/4/6/134622964/zamitewum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501206/normal_5ffa5b0fc335e.pdfIn PDF document text
    • http://gamedv.design/nozekoxidiwibizodo3jopw.pdfIn PDF document text
    • http://winoorama.space/badrinath_ki_dulhania_film_video3n8lr.pdfIn PDF document text
    • http://begdas.space/xisezumojozaralraaxf.pdfIn PDF document text
    • http://proflist-barnaul.ru/fuximojipvkvg.pdfIn PDF document text
    • http://pelistens.xyz/safety_budget_for_construction_projectyjuo5.pdfIn PDF document text
    • http://kifepivukog.iblogger.org/monijizotaxojo.pdfIn PDF document text
    • http://yoptan.space/que_es_una_banda_en_una_imagen_satelital3154b.pdfIn PDF document text
    • https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/dd99341f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408197/normal_6065a9cabd79e.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/rejovunes.pdfIn PDF document text
    • https://rezomiwutamanap.weebly.com/uploads/1/3/4/3/134362688/fuwinabiwulibi.pdfIn PDF document text
    • https://pujuxapalijened.weebly.com/uploads/1/3/6/0/136009243/0505a51.pdfIn PDF document text
    • https://tulovituvo.weebly.com/uploads/1/3/4/2/134234708/d143c5061487ab.pdfIn PDF document text
    • https://vuteduwezo.weebly.com/uploads/1/3/4/3/134336695/5454316.pdfIn PDF document text
    • https://redorofi.weebly.com/uploads/1/3/5/3/135383823/sofezegapimowugit.pdfIn PDF document text
    • http://natur-green.fun/best_korg_volcas4trku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mevedokepovi.epizy.com/como_converter_em_jpg_online_gratis.pdfIn PDF document text
    • http://pebuvow.rf.gd/20512024279.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_off0000f93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93E 4992 bytes
SHA-256: 38cc06ec5ae7ac458e3f07ab66ee44ce383a6767cbf50b41271e1f510fd31c52
font_01_sfnt_off00010a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2E 10548 bytes
SHA-256: 9bbbe0f917294228e5b78980bad5cf44dc6d7d6ba36a3515c883dafe3c67a659

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