Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab514f117b68ddfa…

MALICIOUS

PDF

91.4 KB Created: 2021-09-05 23:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd70226877af1fa989ac9015a32408c1 SHA-1: 70baaf7a6b747d4295fa58072a8679c6935a0199 SHA-256: ab514f117b68ddfa46fa3f1f12939ebfb3f2ebeffeb7c3d1460e94bbd39b2259
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by the presence of a link farm pointing to compromised WordPress upload storage and other disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16075491b1b78d---72588522338.pdf
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/68348970333.pdf
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/lovadulasujewiwexirazabox.pdf
    • http://studio-castiglioni.com/userfiles/files/melovoxuwa.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/5l7nc4h2ij69u6r3hlgpcctdrd/88475751875.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d79a70197---85236570197.pdf
    • http://creationart.hu/files/file/58901532394.pdf
    • http://sipsak.nl/userfiles/file/57587076419.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3390764e4---77439558330.pdf
    • http://www.deep2001.com/images/library/File/23771258005.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e052eda4bd---xenebitetatazuvodexite.pdf
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/c669969a818b8fab4c48bc9b067c5311/72204717895.pdf
    • http://banghetretunhien.com/media/ftp/file/56841480039.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/v043fd7sh4sftg32v22d83nphs/80746053732.pdf
    • http://www.siscbolivia.com/admin/uploaded/fck/file/53945076735.pdf
    • http://beastyenergy.com/userfiles/file/87150426184.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7d7db36574---41161129527.pdf
    • http://chatfieldfarms101.com/userimages/78470648688.pdf
    • http://ceskylakros.cz/userfiles/file/lebose.pdf
    • https://advik.net/userfiles/file/vojexavetuwelemonakolu.pdf
    • http://sdds.be/userfiles/file/67775827467.pdf
    • http://sintjorisparochie.nl/userfiles/file/kimivaragu.pdf
    • http://pogservice.ru/userfiles/file/feruvosiguranipobegu.pdf
    • http://kwong-cheong.com/userfiles/veniv.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/5931c8125b92855a246d4b301063c16d/wededupokebubiv.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1ba2c674735ad609c9f2119f0bab5b56/wokolamovepoxe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=mechanical+properties+of+high+density+polyethylene+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_off0000fd90.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD90 16792 bytes
font_01_sfnt_off000115a2.bin
a8c957293f524b04e4893b34b033e63ec5cfc0ca54c05f5c38084211caa55578
pdf-font-stream PDF embedded font (sfnt) at offset 0x115A2 18452 bytes
font_02_sfnt_off000145c8.bin
aae466a07e6ce9d39309cef6381e1a7fab5def264cfe917d55c2772cfa94c75a
pdf-font-stream PDF embedded font (sfnt) at offset 0x145C8 11004 bytes