Malicious PDF — malware analysis report

Static analysis result for SHA-256 68de9da89fae87fc…

MALICIOUS

PDF

141.6 KB Created: 2021-06-27 12:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aecb53b003f2a45e90a66f5df310550b SHA-1: 64449c61e08690033e587721d24dd1b070beae8c SHA-256: 68de9da89fae87fcc1f75ff52e60dc18ec3ee44009d439b8ea3016777f66b217
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, likely to lure users into phishing or malware downloads. The presence of multiple links on compromised CMS upload storage further supports its role as a distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://premium-house.uz/images/file/nejisutetowi.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/imattbdgjp7nltjiolikqknn95/94720885919.pdf
    • http://indel.sk/userfiles/file/wogijabaf.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/02c771afcc9f1b3524ee776e4f78958c/69741311256.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c545f3e2928423c38d9badb6a46cd2f2/dilam.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/7b192af1b7ed01ca4c2d79dc64495d4b/39036911109.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0f24baa86---17297454316.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bef1080a36b---vawaluvapukap.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749735af66a---fodurenepelego.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b6d17b7bd---wozanewawunekejode.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b58a08211c---nogomijilalirubedev.pdf
    • https://dailyiat.com/html_upload/file/29377396003.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160972ae91d3dd---mopabebidisoguxekuba.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/d85a931cc139d894c7a5f87ab9fb6553/90788142756.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/aead7c0b76780118075b9c9182fb0c11/69250952556.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3daca1c1d---fubabudejolemogobuxopoted.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160802d4b60c47---63824937523.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607941ca677c0---54948557376.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/v1vvfs2j69lg55vlc27j7b2n6d/tudap.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/h242v438r33dacdapj8au71205/desipisilikugumowoxa.pdf
    • http://guchenes.com/d/files/xavokafof.pdf
    • http://barcelonasixtytwo.com/userfiles/file/vezuj.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bff3c858c47---nagagogepokodesujo.pdf
    • http://burgas-remonti.com/userfiles/file/49036839452.pdf
    • http://musorcentrum.hu/files/article/file/jomiturozeledifila.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=geotechnical+engineering+vns+murthy+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_off0001c7a7.bin
023d5b87162e3b625a94c1afe249b03cb29c4d70572b54db7b809c4a13580edf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7A7 17440 bytes
font_01_sfnt_off0001f593.bin
cd600883aa2bf35c48078ca7a4a160d2a09e03f481533ede1bd2732ffe3779e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F593 11388 bytes
font_02_sfnt_off0002101c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2101C 16792 bytes

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