Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f000d25222498f…

MALICIOUS

PDF

250.5 KB Created: 2021-07-19 15:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24c945d5434eb24dca75237b857bfdfa SHA-1: 3c04a05c24fa0c7fa4b31e3f29eef9bccb9a6240 SHA-256: 15f000d25222498f8c05f03721051f9dfa7485fb60ebc8eb8e7c8e24b0beb4be
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing trojan. It contains a link farm pointing to compromised WordPress sites, likely intended to host and distribute malicious PDFs. The presence of embedded URLs and the heuristic PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM strongly suggest a phishing campaign aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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
  • 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.
  • 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://yossy.biz/userfiles/file/nuzol.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbd5abe355---26872293971.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa466e1561.pdf
    • https://daquin-ferriere.fr/userfiles/file/38285066316.pdf
    • https://burgas-remonti.com/userfiles/file/zaxulokukinivalodi.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/uliiqaumj9t10pb07ggouinep5/23542722199.pdf
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/diponuwirenaso.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/0f996fc073bed23e4c81547ea632b78f/60214046974.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/95951105112.pdf
    • https://morabia.fi/images/file/4837763687.pdf
    • http://www.anclupnapoli.it/userfiles/file/15763534077.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/c0ef92213b984c9f11c95a136939f3a4/xupifukulaletuse.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/momuxovavezivegajigiziro.pdf
    • http://mixmarketing.vn/upload/fck/file/pitiroz.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/3nbg19o0455pbttn0iid0t3kqq/92835425990.pdf
    • http://capital96.com/userfiles/file/64009630431.pdf
    • https://abe-rdc.com/userfiles/file/69807364070.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/06f19fdeca76c065be05230164312a53/dibene.pdf
    • http://primebrokeragetx.com/ckfinder/userfiles/files/giloxenunefobivirerexe.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/f59de4ed6fdd2d298b0d94a86a7d95f3/86360806538.pdf
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/gric1r8rfvg450diel0lbqf8vh/mipigipifopudatidopesid.pdf
    • https://aksukartela.com/images_upload/files/58552789210.pdf
    • http://thaoduocvn.com/userfiles/image/file/93117285299.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c06d0b421a---dapanit.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=case+interview+secrets+victor+cheng+pdf+free+download
    • 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_off00037a91.bin
379e50e42c5e37fd84387b4ca2c2b884c620f1c4b85ef0fb8d6c23953f7920fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x37A91 11084 bytes
font_01_sfnt_off00039438.bin
5f510633d7be4602c2f5483b7fe737f5519061fdca34c15ba8e48243c489af57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x39438 18024 bytes
font_02_sfnt_off0003c37d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C37D 16792 bytes

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