Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5441bd1db4b9671…

MALICIOUS

PDF

69.3 KB Created: 2021-05-24 01:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abb9da20aba2666ef38c9a97b418fb84 SHA-1: 22695cc232b97c4591c9a613c968503a79e236d8 SHA-256: b5441bd1db4b96713a4c06b08342b80c74dbeffc091e4a7e61e0058b30be7a65
96 Risk Score

Malware Insights

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

The file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, some of which are flagged as unknown reputation, suggesting a phishing or malware distribution attempt. The PDF structure and embedded content are consistent with attempts to trick users into downloading further malicious payloads.

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 http://strandedtattoo.net/file/12326434163.pdf
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/f3def561092125a339d0e12521703223/2209279307.pdf
    • http://ahcxdq.com/uploads/file/040412128791.pdf
    • https://advance-pack.com/editor_upload/file/41283408788.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4cad4535b---4308808766.pdf
    • https://ludifrance.fr/userfiles/file/wiruxegivararivaze.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984572de5d8---zaromovinizaw.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160796f1621cfa---72413729173.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e93f120b8---77199326350.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609846a160b3a---bakarukivetawadavuv.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/87f04f93b5d4ac6b1b50ec35712976a3/nelul.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b5ec2f76de47318d232a71c0a4c9b384/nogovibuguzojejuges.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce4f48d194---vutufemufikabopodabemo.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3435f17dd---68911564102.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/20gnsd2m8lukseehqcdd5fkfj0/11817711269.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=battle+of+the+labyrinth+pdf+weebly
    • 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_off0000d21c.bin
6a93f79891227064493d314939c58a78f513a8d61e2d0e953cb7b5b20a349f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD21C 5336 bytes
font_01_sfnt_off0000e44d.bin
5be311eecdd58f4e0e84f1b6526c63bb50e8b3e128c53a816f3bc7af6b0abc6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE44D 10864 bytes

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