Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eef4597182085b4…

MALICIOUS

PDF

79.2 KB Created: 2021-03-24 22:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fff0cc1ac5a4ae2322e7040d72328543 SHA-1: f2aed4eb4f80f1ff041fda071c43b958f44b652a SHA-256: 2eef4597182085b4b1d41fb808781bc36abf405fa6da53a4710c08c8b6bf4efd
186 Risk Score

Malware Insights

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

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 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=first+90+days+in+a+new+job+interview+question PDF link annotation
    • https://wabomojufodeze.weebly.com/uploads/1/3/3/9/133999178/notipozekekuraz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_60315b26b2998.pdfIn PDF document text
    • https://virikewujolitof.weebly.com/uploads/1/3/2/7/132712461/ranumonopimuvi.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/66452245451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482012/normal_5fea2fda119f7.pdfIn PDF document text
    • https://rujumimipadud.weebly.com/uploads/1/3/0/8/130874091/kunifoladepod-mobuge-wariwe.pdfIn PDF document text
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/12556.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_5fd97a6a8b4c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444377/normal_5fe16f6eb5567.pdfIn PDF document text
    • https://merirano.weebly.com/uploads/1/3/2/7/132710628/91b151f4.pdfIn PDF document text
    • https://pinozawekik.weebly.com/uploads/1/3/4/5/134589254/01b30f14acea5.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/blood_group_b_positive_diet.pdfIn PDF document text
    • https://nikakakuko.weebly.com/uploads/1/3/1/8/131871571/5850527.pdfIn PDF document text
    • https://finukapaxareb.weebly.com/uploads/1/3/4/4/134494590/pisaxanol_wajuzudolumiviz.pdfIn PDF document text
    • http://vetozadep.mywebcommunity.org/66331334841.pdfIn PDF document text
    • https://podozipejubepa.weebly.com/uploads/1/3/4/8/134893890/0e037d86c43600a.pdfIn PDF document text
    • https://dukagalirizaz.weebly.com/uploads/1/3/1/8/131856141/luziw_xujunamabuwew_godolowawawuw_nagifogakorug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481539/normal_60326ff7ea49f.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/gurowozenupifi/construction_material_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/gunanezaxekime.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/zifoner.pdfIn PDF document text
    • http://pupagerirawax.myartsonline.com/fexolukores.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/appalachian_spring_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/76833773688.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_off0000f679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF679 5636 bytes
SHA-256: e955bed0c6290b6ed61eed042b8d007643f5fb12a7ea8ce3723521bb3c2c0cff
font_01_sfnt_off000109ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CA 11012 bytes
SHA-256: 244dfa668c3a223bcb97b7b71347d02f5a2c8f58f26cb56a7c3a2f8db8738ce2