Malicious PDF — malware analysis report

Static analysis result for SHA-256 39154352c7f67fcd…

MALICIOUS

PDF

255.3 KB Created: 2021-05-06 21:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0f6ccb294929963f7fd86b25da694961 SHA-1: 2ae8501f9cb0447d2b59b288c4f359fb4058df11 SHA-256: 39154352c7f67fcdc36e63198acc47d37fb079b926cecdbaac6ac7e774c96053
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many of which point to compromised WordPress upload directories, suggesting a phishing or credential harvesting attempt. The document body, though heavily obfuscated, appears to be a lure related to an 'annual report meaning in arabic', likely intended to trick the user into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9502

Heuristics 4

  • 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
  • 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://nomylo.ru/uplcv?utm_term=annual+report+meaning+in+arabic PDF link annotation
    • https://unosms.us/userfiles/file/38435931260.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa6d381801---63916306889.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/d6b88edef2281c8b9597fdf341380c5b/77551128532.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e95601cd3---3022593839.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/ronuruderowazexu.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16072a437637fb---kaxunadekix.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/10981960380.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16090aa7706ded---rogok.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/l7afej9av97ng144fngo06v2sq/55239356888.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608349d89773b---82256458867.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a7b43bc76---lodotiporuta.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/d247064db41e06d199e23e0fe4926213/99265945219.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/21a8d044c4296f91eff9e79528ba0b8f/vifusopaneraz.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16088c0f076b98---14450851802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0003db1c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3DB1C 19371 bytes
SHA-256: 785b14a602eff7d0a3796ccab1d57e1cab41c721853f80ba34824cfe3380d3e4
font_00_sfnt_off0003a427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A427 5204 bytes
SHA-256: 4b7f9b0ee7d49348089d87c4c109caa3d9dc8b3e2bdf48a46f9a773f170462f3
font_01_sfnt_off0003b5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B5C6 10932 bytes
SHA-256: 5a9c15f4131cda70579f3067bde157541455940140c5d2f24b9074b052a340a3

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