Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5003987e8ac616…

MALICIOUS

PDF

78.7 KB Created: 2021-05-03 15:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8672c7d2254c8191c83ba9f2f65f0ec1 SHA-1: 4e709f1e271b37444e9eb235e8a7abab191fd7a1 SHA-256: 3b5003987e8ac61653dd169bc3662d0d72f3addb8c3d8fe43a3aebbc5e31d9c6
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body suggests a lure related to legal defenses, and numerous embedded URLs point to potentially malicious PDF files hosted on various domains. The presence of embedded URLs and the ML/ClamAV detections indicate a phishing attempt designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f110a6691d---mewud.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073eed7e6577---lovomivaj.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160763b412bebb---daxadixesaxomut.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6c084e2e3---65919486423.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/cdc945e0c857ce38b76d7a0d0bc78c5b/60277394244.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087adb44435d---mujuvifibo.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160782f7367f0b---jugodezinigowawafomuwija.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/qdm3rsbf0gbmu6l4egk4vb0b44/11927712807.pdf
    • http://absolutelyneon.com/userfiles/file/50910319482.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce7aa621d6---28303794441.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/1aa9f85d09432841dcd4a04841b60306/kelixumubaluv.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1ee318f57---kukibapomisasuleso.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1631cc858---kiwotijoruwiseno.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/1465ee0a6f25f503a478b76a5bcf49c5/24948279658.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607be4c80d300---wagasimipimosavura.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/df5d8fc2a8dd14f5214b823f95247a77/xusumiwu.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16074482b90f28---58500678042.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c82a048f85---71472295007.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=nlrb+answer+to+complaint+affirmative+defenses
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa07.bin
26faf31e90f7190b25831912084668b6e0a6b17e6cc75723ab6c02cf7c6b6879		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA07 5564 bytes
font_01_sfnt_off00010cf4.bin
bddee72ad45c4a0ad1a01fb8140b51b12f41943026b27bb41c3f6f6ecc713ea7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF4 9512 bytes

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