Malicious PDF — malware analysis report

Static analysis result for SHA-256 5654bf0b9919d60f…

MALICIOUS

PDF

84.5 KB Created: 2021-07-09 06:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e3d6f5fb5cfadd517f5847d15102190 SHA-1: c24dc503ebb4e285b0c5a28c4b7dc091ae4decb7 SHA-256: 5654bf0b9919d60f056e766764061b4259c166cfc0dc6e122b92783702e86a75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains a malicious payload or is part of a phishing campaign. The presence of numerous URLs, many pointing to compromised CMS uploads and disposable hosting, suggests it functions as a link farm to distribute further malicious content or redirect users to phishing sites. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution lure.

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 http://innotec-industrie.be/userfiles/file/nagijos.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/gso45cr24446vn5k7a0pfh35g6/59463345163.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608579ff51524---59907863629.pdf
    • https://psfund.org/public/uploads/files/cms_files/61337738139.pdf
    • https://migger.dk/userimages/file/tifojabebamoxejovabavifuw.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa9bbce0dd---76008008376.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/b8b84188f1780ad000c4c64c6b73470e/97671040402.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/hrjg9ga6nj22vcruiqd7rf2fo6/lofojipogako.pdf
    • http://gostinica-domodedovo.ru/files/26192044090.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790469882f8---xoterawava.pdf
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/88097471320.pdf
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e78dcdba8---24295908824.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ad1ce7fd93ee34872bbe5283a047fbe9/56926796983.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74ff50d869---fugunupenibenipujuzolaw.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb10aa7d15---vojujutezezomapax.pdf
    • http://diamondsnspurs.com/clients/12200/File/66806230170.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4e7693fa4---tulezogupipame.pdf
    • http://amdind.com/userfiles/file/jidoso.pdf
    • http://mfcwestenkwartier.nl/beta/userfiles/file/1758737691.pdf
    • http://aroma-es.site/yamituki-n/uploads/files/94522580396.pdf
    • http://stressmanagement-karriere.de/userfiles/file/jepumukubu.pdf
    • http://df-foundry.net/d/files/dafil.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ed48edc4a---79672619066.pdf
    • http://starwindows.ie/ckfinder/userfiles/files/88628684419.pdf
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608312fcd5981---66082525663.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+pair+bluetooth+with+alexa
    • 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_off0000e8a7.bin
9e23049a8a2cb01fc3608365651f5ccd60bfc71a6dd550b34e5449ed21399487
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A7 10496 bytes
font_01_sfnt_off00010071.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10071 16792 bytes
font_02_sfnt_off00011883.bin
012da90dbf08a39a64512131ee370add7f58c9acbf69618ccdf4fe681962e830
pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 16908 bytes