Malicious PDF — malware analysis report

Static analysis result for SHA-256 656afac68d1ae33d…

MALICIOUS

PDF

75.0 KB Created: 2021-04-30 07:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 013040964a1d80d5ecd028c025a73463 SHA-1: dddd4699b62977c65705f49032d143bb9d26d3fe SHA-256: 656afac68d1ae33d718c41907b5229bb47b70738f72eb3bb450cb085eb73ce28
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URLs, such as http://www.assignproject.com/..., suggest the document is part of a phishing campaign aiming to trick users into downloading further malicious content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607079e273ec4---1020191817.pdf
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/3l7dqj5j1gjiom33c8ej1dv1l2/tepumulemategiro.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e76a5549a4---dopanivakafagoworiz.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e326cbacfe---53218111293.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/d406d231a73bbe47512b3d8889666f37/3452003322.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/ndkstb9dvgmvmdbngdrlr1k7kq/21076492236.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b202edd13f---40885529030.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/57e42682c56514c29f4b54317d7d389a/79223083711.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/4c32dcf8fb055269afeb9ffebf145f45/lawokanereketaj.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/278c751c2358fa5bae8f08625fd08f0a/30280034167.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/j5misnltqek1gko29shcdcoe00/dolovawe.pdf
    • https://annjulieskarpmo.com/userfiles/file/88302364774.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/1235b447fa1c6d4072dd6fd0c98469ea/jasixavunanasunev.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd61dc2477---jopazi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=public+administration+journal+articles+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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9f2.bin
8d32f8bf0d4eba13e9a6adcc62fb7f0e6b32ea1fd9dbc66957f9b260859102c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F2 5400 bytes
font_01_sfnt_off0000ec25.bin
c6bcb2baab17b23db84583cbc61b0a46d108e28aeed4e4f135e49346897d769c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 10712 bytes
font_02_sfnt_off00011070.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11070 4324 bytes

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