Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fe0c3ce6d81c7f…

MALICIOUS

PDF

91.4 KB Created: 2021-06-29 09:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a87752db14a838ced444ebf09f43f89 SHA-1: 2885bbbe53841c84db5b83c6faaf9f3efd81a32e SHA-256: e1fe0c3ce6d81c7f730aa968c9b992f21a0f0bc318819d7350a757fb007210d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or contains malicious links. The file functions as a link farm, directing users to multiple compromised WordPress upload directories and other domains, suggesting an attempt to lead users to malicious content or phishing sites. The presence of numerous unknown URLs reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/7cc86eaf1473132615ff30cb704ad279/191630001.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/8fb0a2a099e8dfa2b595bbe9ae549671/40773708450.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160825a28e0584---45466668655.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd95f0725---55087854904.pdf
    • http://zovsh.com/Uploadfiles/files/kifesovejilivetogiwinunaj.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/9539b9799da07512213025f95a87e342/55919431304.pdf
    • http://diversecityuk.com/userfiles/file/nowukemujixezolabetugo.pdf
    • http://garderoba.sk/images/_file/xabuxadiradir.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbf909f2f5---66305252792.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b52a72d96---90378943919.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5109366d20---34858952136.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/22c44b78e8b25b1841df27f73d788cd3/jemababanum.pdf
    • http://blackhorsesc.pl/userfiles/file/28196756660.pdf
    • https://syntellect.ru/Repository/file/76928443878.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c273fab2632---worudubaw.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160aecdd4df4a6---28452882585.pdf
    • http://thongthien.vn/upload/files/muwebasasotojajek.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d86c6177b---raxan.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/8fadbd134f2c5d738368ecb26cedb6e5/vuxeges.pdf
    • http://thuephotocopytaihanoi.com/upload/files/13260756653.pdf
    • http://atol-res.pl/uploads/file/bagezubaruwap.pdf
    • http://edgecs.net/documents/30365420689.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a452d7e00---bojokeparikix.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095bf21be626---18519493525.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096b9134d4aa---77826063011.pdf
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/a6b8589fc517161fe443275dfe1f07e2/kuxijigawisamuberajezetex.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/7p4e3ljhn1v5g3q039n9ut89ud/tubiperojamina.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cooking+broccoli+florets
    • 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_off0000ffda.bin
29ea2306ed896b09424fc0576f7ce3ad6441c2b413cce3e084120f93907b2e56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDA 10612 bytes
font_01_sfnt_off0001184f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1184F 16792 bytes
font_02_sfnt_off00013061.bin
3baeb98f9c7644260713d2b5a4d09eb34f61a9878d39e6be9abb8d2219e83276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13061 17776 bytes

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