Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c4d57da823e0a7…

MALICIOUS

PDF

91.2 KB Created: 2021-06-29 01:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e26fed6dbaca7211bf32a10d3ef6b62f SHA-1: d4ffefb8ca447d7b4c4abf37303c4ebcf479702f SHA-256: 14c4d57da823e0a700775015c5d9f2516e0dc005de9476b9397f7699184c78c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites used for hosting further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to distribute phishing lures or malware. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent, likely involving the redirection of users to malicious sites via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=laying+flagstone+on+dirt
    • https://www.haievent.com/wp-content/plugins/super-forms/uploads/php/files/mv9h0fc7ar33deqbqgrrp8e5ri/49256539233.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/puhh969pmirieelnfg58f59u9a/wolavilanegirupevaz.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080747881e5d---vavusopupawix.pdf
    • http://archi1919.com/smlclub-files/file/27329144157.pdf
    • http://piazzademarini3ge.com/userfiles/files/51546306075.pdf
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/mrp31t361hkvt92drv413fc60d/sarusupo.pdf
    • https://groupunsur1.com/contents//files/verilavupafajuxuk.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/fef619be210c56d5aaf50e1221e5c1d8/72683327665.pdf
    • http://0851gay.org/userfiles/202106file/2021062502014270554.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/9cmlt10h6vt1mdne3u1o95vil3/kuvaxezobikosiruzanomi.pdf
    • http://doggystylzgrooming.com/admin/photos/file/85101689149.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af375cadfc---33475799389.pdf
    • https://langestrand.se/anvandarbilder/204/files/sejemizazadaj.pdf
    • https://radio-aurea.eu/files/file/88416377505.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afe1236e8f3---takawexefanaxiboxidateto.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/qte46fmh4am1trrkqhldnpf145/27934628225.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160776cf02c330---fagixifaxebowoxi.pdf
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/diwepuxonazobetu.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072644a170ca---29069486838.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d6d2d6672---32154209275.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/7112c4656cfea42c621679204cf6791c/wesegafax.pdf
    • http://praxis-greve-polley.de/web/editor/files/11087128209.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/43d44e5a0c9f52ad435352c35fa41796/ditaguwuxebogarabigosat.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b099763d99e---risasovuxedekibunem.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809a3dcff0c---xitonobef.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_off0000fe55.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE55 16792 bytes
font_01_sfnt_off00011667.bin
3c0e3a087efe5a097a5eecc9e67aada776dc3921dc1133fd77e631ff47bd5b68
pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 18792 bytes
font_02_sfnt_off00014746.bin
79d5e2fffd12b1d5ebed825341920678915ed52fd7cf14bae0571fce69042a81
pdf-font-stream PDF embedded font (sfnt) at offset 0x14746 10600 bytes