Malicious PDF — malware analysis report

Static analysis result for SHA-256 e301472df3599292…

MALICIOUS

PDF

91.4 KB Created: 2021-07-17 09:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb2adfee68773a6831acdf86735aff27 SHA-1: 44492fd800b666bd4faa8b84f15a5766b68c9502 SHA-256: e301472df3599292cbc60de1cc7a96fd506a9d9005c79056f97eff40c9423204
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/0fbc647f807b80bb95ea187fe1991084/91609929792.pdf
    • http://www.pranabkumar.com/fckimages/file/furukitarulup.pdf
    • http://prestopc.it/upload/file/24509911126.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/35083717023.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/b893d4ce0a2a01535ab7fd31bcb9e03d/xuganilitowazamavalu.pdf
    • http://versobrokers.eu/userfiles/files/sonebudolutugol.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/805f1a7db465448848d93ac1a38d6c34/wilujakajuninak.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/fd48ed0d3cc9c39502e886fd178f15c9/didosuweven.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c910c266ac---nirane.pdf
    • http://szyldkj.com/luodan/images/userfiles/file/kokujituvir.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/9a8bad792e1abd5396a199d09dc70da4/vuxorezekaron.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/stdva05nujn82rs0d3o7j7q3kn/13145155542.pdf
    • http://klhl.com/userfiles/file/14960694750.pdf
    • http://ty6600.com/userfiles/file/wedavipijinujamesawog.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0856e37dc---80170846754.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/3be6f80f06ff90c73b3167a20474a93c/96361422218.pdf
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/5atfll5mhsghtj902mmt4mmvf1/64652986761.pdf
    • https://zevkotodoseme.com/upload/ckfinder/files/98552361369.pdf
    • http://brmxn.com/userfiles/file/20210515184757_xib3gr.pdf
    • http://abeess.com/userfiles/file/rukilerapagisozelu.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c952af66---15501087894.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/327d79b4e1ae4e709329324da5b4ec24/62071460042.pdf
    • http://efuturesthai.com/uploads/file/vixezofipazemijegadolip.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=open+source+pdf+to+text
    • 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_off0001015a.bin
016b5db5e2b43a6ee18beaf89f4fb590ea66e8ce7c8a50f74ae2bc1d81a7ffaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1015A 10540 bytes
font_01_sfnt_off00011989.bin
f5ed176cb65c86fea5a976e8e58ca47b6f92bff8fd708058a61ad3f202ebcd51
pdf-font-stream PDF embedded font (sfnt) at offset 0x11989 17828 bytes
font_02_sfnt_off0001482d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1482D 16792 bytes