Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb95d8af58c37d9d…

MALICIOUS

PDF

88.6 KB Created: 2021-07-01 13:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22f858f4dff5351099a39a3ac4d2c45e SHA-1: 9a27c0dec0ef7c4936357b600458c93d9d9c2624 SHA-256: bb95d8af58c37d9d882ff32ed5b977c545c68e7db2ff9355660299837ed5655f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable domains, indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

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://coretry.ru/uplcv?utm_term=minecraft+things+you+can+only+get+with+commands
    • http://ausafe.net/images/art/files/11075476661.pdf
    • https://telenovella-bg.com/files/44622219452.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/f932af5ca85258ceda5129f32e44a1ac/66471116993.pdf
    • http://timandlor.com/userfiles/file/lotanekekotipexevefufipaf.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4ac49958d---tagolefowijivu.pdf
    • https://alshamiltrading.com/alshamilfiles/file/zunumogolatexiteb.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608547dfca5ff---47870274451.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/2f4e0ce689bf7c1a4f2e377b8917901f/dozejefolovevowaguwazasa.pdf
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608b519a4316d---67791532377.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/6ff2791d224fcbac14b364f6fe10b61a/ravuxafobokazigodosomub.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a39012f5b9---15257011009.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b80868437---3493488841.pdf
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b29f0da1c---loduzawi.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/50b81735656bc4b643669fe0abb9ab2a/34268505077.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a10fe162f0b---neresewexivazod.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c58aaabe14---75571903502.pdf
    • https://aslimitada.com/userfiles/file/95991097711.pdf
    • http://camionespanamericana.com/userfiles/file/53832162268.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/212e17f6af71c94acf7b729edf163ab8/ronoku.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fce15633ff---63022980713.pdf
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/841b06c0e5a6ac3d39dbf2d343252c6f/527695015.pdf
    • https://bititechnika.com/uploads/file/52105863139.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afa7a625e1---pobiduxi.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/01808922055c9a41590b8795b8f46b66/76810093213.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_off0000f610.bin
754aa48b52db422770d449de4a207e1b801c5ced961ea1fd74a107b434c1d7d6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF610 11216 bytes
font_01_sfnt_off00011004.bin
3fc84915e1bc8a93165e066733ccc17f0237ee802780e0f959d30b63af658a54
pdf-font-stream PDF embedded font (sfnt) at offset 0x11004 17216 bytes
font_02_sfnt_off00013c73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C73 16792 bytes