Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2a613512350fe9…

MALICIOUS

PDF

89.0 KB Created: 2021-06-28 12:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae88d80fe06651213d6505ced9525f01 SHA-1: cac4f85d239105c54560aaf778f4bb118e27f3d7 SHA-256: 0b2a613512350fe9a94a5e9201bad0831d01dc1ac3279660cb9f2bb0086003dc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to compromised WordPress sites, strongly suggests a phishing or malware distribution campaign. The document body is unreadable, but the heuristics and URL patterns indicate a likely attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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.
  • 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://garglob.ru/uplcv?utm_term=frying+with+bread+crumbs
    • http://remont-elektro.eu/archiv/file/11520699670.pdf
    • http://ytlcases.com/userfiles/file/soxasumedaxigegawadoma.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/wubejogu.pdf
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d86c6177b---raxan.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608049ec35145---96629981594.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/hkei16d99v2kkrrvpjqqkfu7ds/6122062698.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e45ca3fcb2---rawabanifedudomitaxugozat.pdf
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/wetovotivupalim.pdf
    • http://flexa.cz/docs/file/gizipusitulib.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/tasenikojilumopakepe.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075333530e2a---66710113319.pdf
    • https://preprodpcb.com/userfiles/files/55964771706.pdf
    • http://jfkanacon.org/data/userfiles/files/dunipekesi.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a62c845d10b---luwapunaduzusejamavuwi.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1388a2db3---nogikodujonikewuwixefe.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/0d7b62pfu7ei9s5ss6lg588sca/59014571002.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/2fae3441ab14c6aa88fbb8630078e2ae/xenebik.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a512136629e---69947502683.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160798bb0de4f5---gavigiga.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83588e070f---sunorawaximonodox.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/4gfj66bmoh3q3hftl5vvbt5ocd/43767327446.pdf
    • http://koryosushi.com/uploads/files/62763470734.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c3303e778---78085390963.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086a9146485c---takemuzevalonum.pdf
    • http://gerocuki.hu/user/file/wirunafemulitinam.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_off0000f674.bin
dba73cabfa264d4f391c59a2e2a7c54c0bb323622bf9b7f5740b94f70995c994
pdf-font-stream PDF embedded font (sfnt) at offset 0xF674 11068 bytes
font_01_sfnt_off00010fe1.bin
b34c050b9161c76b3bfdc0f366c596c44a4e97540b595c018785790dbebd2d80
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE1 17356 bytes
font_02_sfnt_off00013d5d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5D 16792 bytes