Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0daed0b86743b0…

MALICIOUS

PDF

73.2 KB Created: 2021-03-16 09:03:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 88893dd8e49a51cbeecf62c0933fadfb SHA-1: 70ab04fc48d8348e697fae98b3cab1d9639c8032 SHA-256: 8f0daed0b86743b0dafd64d57a91a25aae64a2fe93ad0ca5b99fecf525ba0c91
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://jottigo.ru/strik?utm_term=bk+menu+philippines PDF link annotation
    • http://muxubax.22web.org/tupomotagumonos.pdfIn PDF document text
    • http://copriyghtconfirmed.com/drive_hd_cobra_reviewbvmbh.pdfIn PDF document text
    • http://help-lnstagram-verifycopyrgiht.com/85007272482t8xev.pdfIn PDF document text
    • http://feremujidonigu.getenjoyment.net/91610462123.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/tezutofopasenezatatovu.pdfIn PDF document text
    • http://badineduvike.22web.org/zesaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393189/normal_5fec1de057a33.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/tabidepodigovo.pdfIn PDF document text
    • http://gezilobogobig.22web.org/rizotabanaromo.pdfIn PDF document text
    • http://fenellalucynelle.info/applicant_tracking_system_resume_templatepnb1t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461746/normal_6006b725caa1f.pdfIn PDF document text
    • http://pubgmobiie.com/jafefiworuvij54a6y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://janilemexe.epizy.com/82580230812.pdfIn PDF document text
    • http://dowirefe.rf.gd/88409052621.pdfIn PDF document text
    • http://zobovobewuw.epizy.com/allah_allah_allah_hoo_lori.pdfIn PDF document text
    • http://vimutimagokezek.rf.gd/xolaxuwoveme.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/27985266422.pdfIn PDF document text
    • http://ponusiniwanus.epizy.com/jujugopizafunijusuk.pdfIn PDF document text
    • http://ritumogadoj.onlinewebshop.net/tisebawubiguw.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/sony_bdp_s1500_universal_remote_code.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_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 4868 bytes
SHA-256: 6f18c98e43006fbbcf94c3dc2bdbdb9d8759ffdde162ec2266afb39427e7375d
font_01_sfnt_off0000f163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF163 11348 bytes
SHA-256: 894889fd32bf4a88c9d446f21d48f297672c742e8f6c5c2671a1d76afae559c9

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