Malicious PDF — malware analysis report

Static analysis result for SHA-256 24204be254eeb628…

MALICIOUS

PDF

214.2 KB Created: 2021-08-17 09:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 438c478581a5bdb5e9e785e2475b4888 SHA-1: b4e169e0b41ad495572f63a8ec3efd52bac79269 SHA-256: 24204be254eeb6284f9fe3c65b1a0e598f89bd18f9bd45ebc561b1d7b9abf909
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution lure. While no scripts were directly extracted, the PDF structure and heuristic firings point towards a phishing campaign aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9841

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://seamacros.com/upload/file/xajawejamurawegipike.pdf In PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb9942caeb4---22483799905.pdfIn PDF document text
    • http://ecoevopublisher.com/files/upfiles/file/3465076718.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/mn07kk9vklt63iksg87mfgfp7u/54117336452.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b926b5dab---7438542320.pdfIn PDF document text
    • http://mixmarketing.vn/upload/fck/file/zizilajametisuge.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e4eeb8312d---73188766463.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/97321985183.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077596c947d7---22494893120.pdfIn PDF document text
    • http://aimic.com/userfiles/file/13755547953.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/27663594111.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/49929060827.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/13f8fc589941a59c197e5847f24d14db/xoserebinik.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/0f9baa092738c7926308ae2e0cd23a99/5819543098.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/jumedofobofijejuveke.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/mufulajun.pdfIn PDF document text
    • http://landia-print.com/pdir/file/32641046591.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/75685149589.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872c25bc868---92062568741.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21026196dc---6817490320.pdfIn PDF document text
    • https://coil.hk/upload/files/24566510050.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/42600892692.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bb2e3caf54d4e5e4d374ff8f60998a27/nozorawosika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=management+consulting+industry+overviewPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E580 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD92 20308 bytes
SHA-256: e1cffe3ff640672cd4875da33ec911dd4cfe66349d50802cfa74cf4bd76c91e7
font_02_sfnt_off000330b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x330B7 11072 bytes
SHA-256: 1e453403991680a8d7a2ba81f9374f501212cb2fb78264e1f762a957d02e7aea