Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a4a60109750422…

MALICIOUS

PDF

68.9 KB Created: 2021-09-29 00:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1ce92d265d134bf9067f3f10d119f1b3 SHA-1: 2ca6b36645119fc668f850393ed3e34b09b7d99f SHA-256: f0a4a60109750422ebec0dbeb10a9b5c51751d4f3327529fc3a1d85170b5f8e9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting a link farm or phishing campaign. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a pattern of using disposable hosting for these links, further supporting a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://irlanc.ru/uplcv?utm_term=android+save+settings+tutorial PDF link annotation
    • http://fogathajtohirek.hu/fckfiles/file/gemawiranalejajor.pdfIn PDF document text
    • http://abwclayton.com/uploads/files/wokid.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/53101073284.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/tasipevaxewizexabol.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/41766220074.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/31002467556.pdfIn PDF document text
    • https://tdemo.order-pro.com/ckfinder/userfiles/files/63529488306.pdfIn PDF document text
    • http://micruts.org/userfiles/file/44101899309.pdfIn PDF document text
    • http://secoinblock.com/upload/files/25752040783.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/28456438902.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/41990944634.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/bepixajeke.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/4974841805.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/58131790288.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/guponugipuwa.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/gimisesowozatukuvira.pdfIn PDF document text
    • http://vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/27150341830.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/78351710896.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/75764296884.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/jikexoj.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/joxozibafufipu.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/1310422386.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f6c4214a2a7c416c34f77ec5addc7c8d/55751920536.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/83226988910.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/b5e465f83cb38ce9e64ce2b2af63f297/togifuwobapuzixorilat.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB017 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82E 10572 bytes
SHA-256: 6df03518f09ad5318ca52149e543b0b28ccb860e84589e96d9a1e37d9ad63926
font_02_sfnt_off0000e03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03B 14824 bytes
SHA-256: 1a25aebeb924480ac6f42e804ec657a72bd61a234e6532e7b81fb64d9968bb92

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