Malicious PDF — malware analysis report

Static analysis result for SHA-256 9832205e4a80139c…

MALICIOUS

PDF

70.8 KB Created: 2021-09-30 20:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b20fd64267edfb1ca54e5cc7f14f8e6 SHA-1: 086a5ee8997c2662a3b97106aa069ff60e616ea6 SHA-256: 9832205e4a80139c713443c6a555b873651c635493e09a090a0d5ed30a1ac7f9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to external domains, many of which are structured as link farms or redirectors, suggesting a phishing or malware distribution scheme. The PDF's structure and the presence of external URIs indicate it's likely used as a lure to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://inwebjor.ru/uplcv?utm_term=gta+1+million+free
    • https://ferdavagnar.is/images/fck/file/rodiga.pdf
    • http://rencontres-icare.org/userfiles/file/97154061894.pdf
    • https://stcc-sa.com/motakamel/Ups/files/92427023976.pdf
    • https://assignmentmart.com/ckfinder/userfiles/files/xiketajikeduju.pdf
    • http://orlickachata.cz/files/files/49722058988.pdf
    • http://henghuitong.com/jingkelun/userfiles/files/20210917104437.pdf
    • http://abwbaltimore.com/uploads/files/niresitop.pdf
    • http://smelawservice.com/file_media/file_image/file/7444992067.pdf
    • http://efuturesthai.com/uploads/files/rugojonukabobuboripa.pdf
    • https://eniedu.com/data/file/20210911032604.pdf
    • http://getampedmag.com/ckfinder/userfiles/files/sosuzibunozugi.pdf
    • http://soosanfix.com/upload/fckeditor/file/kefezawiv.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/09bc032e09750bb12a2f363320554068/ranezexokimavadi.pdf
    • http://superbarter.sk/media/file/xigutitozapajem.pdf
    • http://galettedesrois.eu/userfiles/file/duvepebix.pdf
    • http://targhevaticane.it/userfiles/files/97986760631.pdf
    • http://umhouses.com/uploads/files/26691259898.pdf
    • http://ozhelalikram.de/resimler/files/97220593007.pdf
    • http://files.ibiza-ferien.de/file/mibuviv.pdf
    • http://miet-boot.ch/images/uploadedimages/file/45567625894.pdf
    • http://clubselectionvoyages.net/images/file/34034542821.pdf
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/vofixawefugizejofagoluxij.pdf
    • http://www.mostenpo.jp/userfiles/files/sixufibalovo.pdf
    • http://www.gonouvellezelande.com/files/kaposor.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b208.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB208 16792 bytes
font_01_sfnt_off0000ca1f.bin
5789e49abcb455ef58bfb39e1f1581a2191c9b2f3fb5f4173ce7a5534a7c4d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1F 10300 bytes
font_02_sfnt_off0000e14a.bin
eded12745754d36fd2d0b20c1a663f35138fcf304e1210edbc796fa204213548		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE14A 17428 bytes

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