Malicious PDF — malware analysis report

Static analysis result for SHA-256 047fba3bc58eb8ab…

MALICIOUS

PDF

89.1 KB Created: 2021-08-06 15:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e7129218cb6e9cc92bb169360feec22 SHA-1: 8ab574e83aeef37e94d8feb03f0a2d7c1a6ff5d6 SHA-256: 047fba3bc58eb8ab79996724916b5e89db17bc04c632c4977ffe327e2af42420
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution attempt. It functions as a link farm, containing numerous external URLs pointing to various websites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://philabc.ru/uplcv?utm_term=cr%C3%A9er+une+cl%C3%A9+usb+bootable+sous+windows+10+%2F8+%2F+7
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/27706734575.pdf
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/qm333s80i010bun5u9kal1vaas/45725539949.pdf
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/41c405a33757b106f7d23ca60afe6a70/giwom.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160aabc849c3b5---86808902695.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/231b054657d69ae5e953f0085143e57d/29009533498.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/q5fd2ud35utc8kkc5pr5cauv37/46243282582.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e66c1ed9e7---93196185037.pdf
    • http://mcutech.net/files/93841075823.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/s4klac85l69u80hpgp7oe3mrmu/musubijipojefazomuxonilak.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/e9122b12ba1f0b6dc191e0ea42e1a60f/75349737227.pdf
    • http://parkety-patemal.sk/files/file/98292860641.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/nu5sbplkt9k2sheanltr4bmoc7/80003618552.pdf
    • https://jdrum-music.com/uploads/ckfiles/files/34996358767.pdf
    • https://ludifrance.fr/userfiles/file/foxowovu.pdf
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/d52a80fc3da58362552516861bd21996/980250293.pdf
    • https://gabinetpro.pl/kosmetyczka/krakow/files/96739866320.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/mr01kosi6j6cpidrqm2pjbkai3/donaratumusoga.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9a4ec7079---zejeradunelixalufinajelu.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/7d5406c4a1486f7dc29bd8d34437bd62/95510304332.pdf
    • http://lahma.pl/_u/userfiles/file/runabaluxejelazijema.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/3e4952ab71d02c2453e472c9915c5c9a/sapebuvutosovikodasenuri.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c51d015bbb5---35405186317.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_off0000f140.bin
27fd9fe98b20f18e0bf35e1f035c532a4e17d803bf5adf4ae5c811c6f293a7fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xF140 11340 bytes
font_01_sfnt_off00010bf6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF6 16792 bytes
font_02_sfnt_off00012408.bin
685c0dbe9559fca897fc28ddc59c016cee130237d1b8f58dd689c217b539e4fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x12408 18572 bytes