Malicious PDF — malware analysis report

Static analysis result for SHA-256 29358f75fbce203c…

MALICIOUS

PDF

75.6 KB Created: 2021-02-18 10:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f76ee3d2ebed740a550ee31805bcefe8 SHA-1: 6a7ef45c4bdcdd7017a2c604b9c285c522b4ac4f SHA-256: 29358f75fbce203cfce49929bd388c1b71537da0d4fa2ef3b1d358e22db23b21
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 0.9996

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://jacksth.ru/strik?utm_term=80s+quiz+game+answers+level+14 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408002/normal_5fe830d1ce945.pdfIn PDF document text
    • https://cdn.sqhk.co/fizuborugas/j5qB5jd/puwedu.pdfIn PDF document text
    • https://cdn.sqhk.co/wimakebibane/gjiaOhe/19655573328.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/jfbnhfC/satemupexeduxetemegafewut.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/ghhihGh/maplestory_dark_knight_mobbing.pdfIn PDF document text
    • http://xamawodub.22web.org/19630573434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_5fdaf49631450.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/ifhiagi/nufarezobomofatoxapaz.pdfIn PDF document text
    • https://cdn.sqhk.co/gitogozune/atEz4jh/nudosilidezakavod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487658/normal_5ffa3284a461d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kewakuko/cowin_e7_user_guide.pdfIn PDF document text
    • http://rizinesuri.epizy.com/pidakuvivubezexopimuzin.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/81989409116.pdfIn PDF document text
    • http://gorefoverotiw.epizy.com/buvufexepurilunewubaw.pdfIn PDF document text
    • http://pepudujer.epizy.com/epson_v700_scanner_power_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/jagdalpur_weather_report.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/6059355945.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/god_and_the_state_bakunin.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/docker_image_from_jfrog.pdfIn PDF document text
    • http://duxawunofuror.epizy.com/gaxejek.pdfIn PDF document text
    • http://wijevisufa.rf.gd/mifepiluwepum.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_off0000e7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A2 5712 bytes
SHA-256: 121f876a12d9151310b584a7777ce70849e5de43bdaab3da13552e70c6652557
font_01_sfnt_off0000fb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB27 11152 bytes
SHA-256: 2b8277218afe63a6d9f40ba816a94ea46e08d15b7a35133c85f33117bb78d876

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