Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bd7a729840902f…

MALICIOUS

PDF

71.5 KB Created: 2021-05-12 05:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f7a9f8a4bceda0b87847f14154f3b50 SHA-1: a100b7e0ce726e7e4d012d449ede7b19b5a7d4cc SHA-256: 78bd7a729840902fdebc90fbb1c6c0b3207214aa701b0e2da86cf2ef6c01153f
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with one specifically pointing to a suspicious domain, likely serving as a lure for phishing or malware distribution. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this attack pattern.

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://krisoc.ru/uplcv?utm_term=report+audience+tribunal+grande+instance
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc52e45e37---furajetevefotaruf.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/gtvbpp67pvu4qd443q7nohc5a4/36975428806.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/1e381fd16bb258a0dc9bd34d9d373151/ganemulasamajujigexus.pdf
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/c09ca68e4dc9da3bc7c3631d31bcf768/1377026328.pdf
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/2sjodbcfj98bkh21j7ekm26njf/vepewomusazezosuri.pdf
    • https://glbtrader.com/userfiles/file/firukemepogisixuxijovi.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/aqe82h273df9u05gmmnhgqm20s/65930727917.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160858f16a3bb8---53617471244.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf8657e248---80664906793.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/77fbfa63d4eade49f0461b3d7b7b448a/77275155085.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/545a6776ea168c7918fc1573525c5fcc/tefizaxi.pdf
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/64481f8d6fb9f4ab1f470ef266eeac01/jazuzitezebu.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d020ba37f338024507d49615957bfeed/79630547358.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/1afed840f9f7c7bbb7528d6d595d2a0a/kuzuzenowa.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/97fb5de5af5872c87ebbfe03822e17c3/wozilig.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079384537feb---73482142454.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000d7d5.bin
547477a437ac7f9a60bbd14ffb553f6d5c594668f233ba1362964ad98e109871		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D5 5388 bytes
font_01_sfnt_off0000ea32.bin
7d55af2053abd9a579c5a3c66bdefcf46deefa97f2af6a1ff3f1a91e07c7da4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA32 11640 bytes

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