Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc0d9ea88d1da47…

MALICIOUS

PDF

88.4 KB Created: 2021-08-11 05:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5aa114705d5ff4a70461d8889c83a99b SHA-1: cc718d8144e500eca601091c71210d830be5de03 SHA-256: 9fc0d9ea88d1da47ab6c8829ea4449865d3134a1c6c1a7ba0281f2aa7743f5d9
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://drafthe.ru/uplcv?utm_term=can+you+use+obs+on+ps4
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83d4c7e96---81266410100.pdf
    • https://gloriouz.in/ckfinder/userfiles/files/ganapogizelogojolupik.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c59e448d16a---75060564829.pdf
    • http://www.gonouvellezelande.com/files/nozaxomepabegilidukud.pdf
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/zuliw.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/fc51dce285bc6bf26d258e7c9b657b6c/lowiso.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160acbcd1827fa---benuginakonefona.pdf
    • https://mamadona.ru/ckfinder/userfiles/files/sekutexosewidivonadupeba.pdf
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/nidagitiloja.pdf
    • http://karlsbach.de/userfiles/files/33962199900.pdf
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/38359aeca9e23de8a8b6c16916e0b2c5/jojokakutaferavira.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7b1fe42f2---loramogeduf.pdf
    • http://www.pranabkumar.com/fckimages/file/botijavufidoti.pdf
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/72252793156.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/a1fe1a1f1701a85759ae4f0d996623cf/59772323894.pdf
    • http://beastyenergy.com/userfiles/file/68513979225.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/d82ba3aaa3730adab2d88add3096fce1/46687202335.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5b90673dc---77080695449.pdf
    • http://palyavalaszto.hu/teszt/upload/file/susoluxubititiwesudegi.pdf
    • http://sanruou.com/app/webroot/uploads/files/megabekajisu.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9f92c1b5c---94366547731.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6124b81de1---28853340577.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081ba9c73721---jilosusenulexu.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_off0000f7f2.bin
996e84e9c5bc5173b91008a30cfc884e2940f7263cd2110e31cc003e924a9143		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 17004 bytes
font_01_sfnt_off0001244a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1244A 16792 bytes
font_02_sfnt_off00013c61.bin
0fabb925bbc4734fdc849adfe65cde2ad0a5dcfa0ee4970e62dd4a8d6ae6b5ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C61 10372 bytes

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