Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0b6edfd1601f50…

MALICIOUS

PDF

85.6 KB Created: 2021-06-29 02:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e32f54119c166731d1806df2e56e58a SHA-1: 197e4cfc7a6444a840a460cf3bff194c556e5cec SHA-256: ab0b6edfd1601f50e76f7b71c84ff55a5a83de7faba5882e2e3990e48231a728
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crewmak.ru/uplcv?utm_term=my+emotions+are
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a5dbd789f6d039727c48d055517058a2/vaporezavovedoxixo.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850db0a3f35---15174598928.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b96d258e9ca---tevevirozonovefix.pdf
    • http://sarlampa.ru/upload_picture/73741113712.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/m660d94q6cs1odb4t6tt6ben5u/voxetipisusasozuwoboro.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7ac8ef65c---30425831466.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/dddca7ee53682e3334447e9ccfa9fb4f/zaridapuwirigonevutabed.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b8cf458e4b7c77bba40d155df94603a4/xawepeviminosekerozori.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088f8a0ec3c7---71975663428.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160909413044c5---56013230254.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/cb79f058292033bb804f640bbe28e5c4/zaxila.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/94unkfsolj23jl397inrt2dg5i/21104098568.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a58a65b0b8b---32841407727.pdf
    • http://robalton.es/Albums/images/file///gimera.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/60c3aa1a66f5afd52b11ef231b50edf7/nabebexosojurobawerip.pdf
    • http://dragonera.cn/admin/userfiles/file/zegufeduvefovaxemon.pdf
    • https://amrapalispot.com/userfiles/file/werikezisenakubu.pdf
    • http://constantemails.com/userfiles/file/162491694123532907585.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082daa6c04b7---kikewonepefumixemor.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e781593076---52028147557.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/fcdst1smefurksgdkqh521raj6/41028194843.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/kisowikuvoduzinipebokelog.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30816e4280---10739510600.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086037d8fd81---43707356523.pdf
    • http://tvkinter.com/file_media/file_image/file/dulumufinibavaliw.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_off0000ee29.bin
e164679983e0f0eea50c00d9d04d0bfc8ef1aba11beab96293458f6f178bd7e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 10328 bytes
font_01_sfnt_off0001057c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1057C 16792 bytes
font_02_sfnt_off00011d8e.bin
f2a894d711d49680b39cbeaa6a007646ba714b59404cccb343a4e744bd7e6da9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8E 16888 bytes

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