Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2225813893a212d…

MALICIOUS

PDF

78.2 KB Created: 2021-04-29 01:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00de6077adfad2195ddbae28017da397 SHA-1: 7b99f00e46d23383b18d10d93672f74a755dbde4 SHA-256: f2225813893a212d9ebd8a21791e204300c1efa45a8e66c4ba0329c7c9961088
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to redirect users. The primary URL, 'https://zajinet.ru/strik?utm_term=macroeconomics+olivier+blanchard+7th+edition', suggests a lure related to academic content to entice clicks. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://zajinet.ru/strik?utm_term=macroeconomics+olivier+blanchard+7th+edition
    • https://static.s123-cdn-static.com/uploads/4407991/normal_5fc9372679d54.pdf
    • http://suwufexez.sportsontheweb.net/80340860159.pdf
    • http://limezage.scienceontheweb.net/princess_diaries_book_3.pdf
    • http://xuzotudaraderuf.mypressonline.com/41988770527.pdf
    • http://mogoxopedutisaw.iblogger.org/xexatidamiw.pdf
    • http://vazagitomis.mypressonline.com/34081609062.pdf
    • http://xonejalevesezom.sportsontheweb.net/51851249366.pdf
    • http://xezupotivevilib.22web.org/animated_movies_2018_tamil.pdf
    • http://durebemidiges.getenjoyment.net/tekowomofijifazakejoda.pdf
    • https://cdn-cms.f-static.net/uploads/4460950/normal_5fda12fb33082.pdf
    • https://cdn-cms.f-static.net/uploads/4447885/normal_60258838c4ea6.pdf
    • http://pimifawimonidij.mywebcommunity.org/xagapiwamojidotijimo.pdf
    • http://lezigovedavide.getenjoyment.net/tuvavenofaz.pdf
    • https://static.s123-cdn-static.com/uploads/4378386/normal_5fc6659d1210c.pdf
    • https://cdn-cms.f-static.net/uploads/4488137/normal_602be30a98365.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kimatun.epizy.com/brachioradialis_exercises.pdf
    • http://fuvogixerad.epizy.com/bimemuranuvijakarupiker.pdf
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_64ee0a7a47f140978943e7fc2d69b77b.pdf?index=true
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_45174c573ea9400c8845642e617aa346.pdf?index=true
    • http://fararisujis.myartsonline.com/nebivenef.pdf
    • http://sijipenumi.epizy.com/vokepote.pdf
    • http://wavujupozin.epizy.com/loluseguvelana.pdf
    • http://xewewiwuxadul.rf.gd/grade_3_math_multiplication_word_problems_worksheets.pdf
    • http://tajiroxajesolut.atwebpages.com/anagrams_quiz.pdf
    • http://jedajokojar.epizy.com/senodinamuvututaxex.pdf
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_ec7daecc45514781bd6c269b8e6e1837.pdf?index=true
    • http://duliwijedij.rf.gd/como_saber_se_voce__esteril.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2fb.bin
53c30864bc19561e8351031d8b7d6a3f33f4214c96436f8856fbda5446a5472e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 5464 bytes
font_01_sfnt_off00010576.bin
05257706064f215f841aa6dec290a0d6c6c56aadc24cb650108ca85e1ed33e44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10576 11224 bytes

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