Malicious PDF — malware analysis report

Static analysis result for SHA-256 91c8c8c7a9c1cd29…

MALICIOUS

PDF

77.1 KB Created: 2021-07-12 20:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 429355782acec54844ef40b9f6e6b2c9 SHA-1: 4f972e49550277b3fadcec395dfdd86c3706487a SHA-256: 91c8c8c7a9c1cd299de14b1f73e3bc9f085d7ff6616f91b7c5bbfac7bf931d85
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded URLs that, while currently classified as benign, are likely part of a phishing or social engineering scheme. The PDF structure itself is also suspicious due to duplicate object bodies, indicating potential obfuscation or manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/sq/ugae/~3/eaN1Eb74jJI/square?utm_term=how+to+clean+junk+files+in+windows
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e960c32c5c2f6215cad192/1625907395902/memosadoka.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f3ec854c1d3b34851b6b/1625879532230/statics_and_mechanics_of_materials_5th_edition_free.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7aa35d0799e4214bdcf54/1625795126041/what_is_your_goal_in_life_best_answer.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce03.bin
7fab42a3f646e18318b105c452c919bf9622c2dbb6b7a395fd5eced95ba9a024		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE03 16132 bytes
font_01_sfnt_off0000f794.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF794 16792 bytes
font_02_sfnt_off00010fab.bin
bd8e8a21e2ff4b1e91f8525d3bb3bfdca300e7c8aa61d4e465bc94aca76efeab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAB 10768 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.