Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e0a782d7e28424…

MALICIOUS

PDF

84.7 KB Created: 2021-07-02 10:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d693df31c2a14634a273203f5dbb5cbd SHA-1: 8a7c90d029f359b8ae2c2409f11bcd28e6d73ffc SHA-256: e3e0a782d7e28424b12f18c6d814ec1016920a652f2e5a2050a9a6b2ecd9c855
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and other domains. These links likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/047551df06f3bca3065c460dcae68c25/80140595546.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fae990c4af---beredaxokin.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820e84750f7---53681189134.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/95652008734.pdf
    • http://goldnumber.info/userfiles/file/lawebo.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/fhqrplq8ocbhjig4deab0cikr4/gipokegozijeb.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d16d87961a---golevakemefiga.pdf
    • http://market-oborudovanie.ru/upload/file/kanufulezofumadunozi.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/kj17s54fodclnlfeoiic4mt781/satuloninin.pdf
    • https://ludifrance.fr/userfiles/file/94567527607.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/ehr38qu99uec2ekevs5li0v2mq/ledam.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac01e56a88b---28005249200.pdf
    • https://ludbaegitim.com/calisma2/files/uploads/42264223414.pdf
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b07f8514f6---rigipojerefadepedofexi.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/0f0f44ada91490643c494ad66fb486ff/66657730437.pdf
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/bevinuperonubimafef.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/186a40bedfe6015b034e421c93a2dd7d/57356532047.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce70be2c47---mofuwewimasetinivofefa.pdf
    • http://notarbrazda.cz/userfiles/file/84686410720.pdf
    • https://gomaihoa.net/upload/files/95202163980.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609757592bfec---totemiruxexodekileku.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160767082a5972---jivivejonoxodekosibu.pdf
    • https://thucphamtruongxanh.com/Upload/files/25207214879.pdf
    • http://artecgroupservices.com/imagenes/file/ketate.pdf
    • https://biomedchita.ru/imeg_master/file/matelitukuket.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=sell+watches+rdr2
    • 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_off0000e663.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE663 16792 bytes
font_01_sfnt_off0000fe75.bin
4fb39853d72533fa5e357587d64cb0a7c0aa67fadb4bca0327cc4a7f9dd1cdb8
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 17976 bytes
font_02_sfnt_off00012d9e.bin
05969d5e67719ac7d05949518a47d345ee608eb070dba8c91439cc8e2b5ed5c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D9E 10432 bytes