Malicious PDF — malware analysis report

Static analysis result for SHA-256 225eddaf05ae3dda…

MALICIOUS

PDF

91.1 KB Created: 2021-03-23 22:11:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 13b882cf15b49eb7bf82518595298368 SHA-1: 166aa045c9ad99ab433b840654bb18ab871a60ba SHA-256: 225eddaf05ae3dda01865066b689a4d8f51dd70f3c922330bc1cec10be01ae16
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 0.9997

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://bologen.ru/strik?utm_term=follow+me+david+platt+audiobook PDF link annotation
    • http://sufawevugut.mywebcommunity.org/71052872787.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/warof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_60591d3e1d0b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463264/normal_604b4d10371fe.pdfIn PDF document text
    • http://how2clever.com/element_tv_problems_with_soundzucx6.pdfIn PDF document text
    • http://pebogoginugi.iblogger.org/pegonusewebibabiragezege.pdfIn PDF document text
    • https://cdn.sqhk.co/miropefaneka/5hh1XMW/28260056722.pdfIn PDF document text
    • http://vawadofofasip.getenjoyment.net/wariwuzupexawetojo.pdfIn PDF document text
    • https://cdn.sqhk.co/mapelimujeku/ehejjgg/10801387551.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/jaQjgia/jugeri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_60547fab68757.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gotozowixefe.epizy.com/67405434556.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/88526512179.pdfIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/canon_pixma_mg5320_printer_ink_cartridges.pdfIn PDF document text
    • http://domuromu.atwebpages.com/95055832554.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/sumasugukoxigagofokalibe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB3 4916 bytes
SHA-256: 4fd62e3aecae5f324a100e7986bd4051306b6e3c8b942c9d6fc3d2f204bac0dd
font_01_sfnt_off00012b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8B 11036 bytes
SHA-256: bc4fa95392136a2fa9e5ff08fa0e1e14fbe271b1020b4838f05eb8bc3ab033c8
font_02_sfnt_off000150f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150F3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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