Malicious PDF — malware analysis report

Static analysis result for SHA-256 04295bcd59df8015…

MALICIOUS

PDF

72.1 KB Created: 2021-07-30 18:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4aa505f9e0c1445c332955b328df8098 SHA-1: a88419fe0271728a84f233a3250db5ac6be7a938 SHA-256: 04295bcd59df80153b4423be1370da74dbd0b57ed9191ba8a8436fb05eb1111e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting. This suggests the document is designed to redirect users to malicious content or download further payloads. The ClamAV detection as Pdf.Phishing.Trojan further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7038

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://chcial.ru/uplcv?utm_term=zombie+survival+offline+shooting+game+mod+apk PDF link annotation
    • http://onlinecommerce.bg/uploads/pages/files/26705241201.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bdc7e7df3d2---vafuselilomulebefide.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/cuavrhadhe721i7bkosujm6ihq/18941860942.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/xejiwubutoxeket.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/sedefata.pdfIn PDF document text
    • http://kme-kme.cz/files/file/vulomanuwepejoxume.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/i6slm0mnsign2f8inrlnmfcm71/82526033857.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/2aa4ebe782dc6f7cbed8579ea5a0bc4d/20170462136.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/75033237353.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/95pjc2n5vlvm84e1juc4n4up8q/samoxobulegegazonate.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/10c97cc11d54f76a619b96e5dc517a62/57277262137.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/4fc704b1f6673c4cc14130acc6b37799/zajifufukuwonanen.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1be0d3a2a2---95088058494.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/merulizibep.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/eadcb8fa75fc28890c53f0dc273466ed/78825350922.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/782392596.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/lezimo.pdfIn PDF document text
    • http://allseasonsbanquet.com/clients/868236/File/kibogirewafojudasaluxoj.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c11fcf2957eb3ea63138319f8488fece/wewurawogobemorivaxed.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/gudifozug.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d193098415c---fujejoganotozo.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102cb7c0ea06---72130091707.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/salew.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/cff6e596f10a62e14b0725ef9d1ba187/89159984775.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/makuxopamaremer.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1623373714.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/zezuwudetim.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA16 11308 bytes
SHA-256: 467f63691f4cbf406597e1fbb57a6a8b20734cc863f928aeca7912b6dcd31f35
font_01_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 17820 bytes
SHA-256: 8753c7ff8a74b5f620bdfe46797d61bbc63037f2d8e80deea9f7b6f572c0a3ce