Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aeec21f95e1652b…

MALICIOUS

PDF

71.1 KB Created: 2021-03-07 00:27:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 727a23b5f93ee0e91a23c668a8f2763e SHA-1: b93a060cf9402db3493975528c1eced882f2b8b9 SHA-256: 9aeec21f95e1652b267579449c32ca992643a32d7d80fb5a1bedc078f45c15da
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary external URIs points to a suspicious domain, likely serving as a lure or part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/wix?keyword=mass+rmv+driver%2527s+manual+spanish PDF link annotation
    • https://tujakiko.weebly.com/uploads/1/3/0/8/130814553/devuwurawuv-molakinogavib-tobid-doruson.pdfIn PDF document text
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/dapebigu-dulakorurotusi.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/wulorejad_pujudunutu_gabimimaludaza_bidixuv.pdfIn PDF document text
    • https://jenifamizoj.weebly.com/uploads/1/3/5/3/135319667/monufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369174/normal_6006a3d8b04f6.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/9jhhahP/86680367891.pdfIn PDF document text
    • https://cdn.sqhk.co/suzironanes/kZKpnhe/robopozulanosividiz.pdfIn PDF document text
    • https://tajamopem.weebly.com/uploads/1/3/4/7/134745730/binatefuwodox.pdfIn PDF document text
    • https://wetusaseri.weebly.com/uploads/1/3/5/2/135297966/banesa-xudog-garenifopo-dinopikewowe.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/d5jhHrc/xexidewudikesabava.pdfIn PDF document text
    • https://gawokani.weebly.com/uploads/1/3/5/9/135993895/gesizebadibus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463532/normal_5fcfeecc1fe42.pdfIn PDF document text
    • https://rivodufut.weebly.com/uploads/1/3/4/3/134369250/dufadujisovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagusax.rf.gd/bloodborne_chalice_dungeon_guide.pdfIn PDF document text
    • http://wapudajikipidem.epizy.com/bomogetafupexatuvas.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/80610753152.pdfIn PDF document text
    • http://kepipejesa.epizy.com/bacterial_concrete_ppt.pdfIn PDF document text
    • http://mibavened.rf.gd/20705214218.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/guzidazepalupagubituziwe.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_off0000d9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D5 5300 bytes
SHA-256: 37096ea501da3d25aced3d830f7fdf262a63aed59ae748599e7c49807871eddb
font_01_sfnt_off0000ebc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC4 10428 bytes
SHA-256: 42367fdfc2439594e9890ee367160ada275080c6e82bfdf857794240f36f8bf9

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