Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0928e61df18c89…

MALICIOUS

PDF

81.7 KB Created: 2021-07-17 04:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a7ca34c8dc5af2901a6451015df29c7 SHA-1: 5f12c9925e257a12d1e29c9b542b7fb90a92d3b6 SHA-256: 8c0928e61df18c89a1dafcb957acf452d46f697a3c5d9f73f7f523d363fb3424
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a URL that, while flagged as benign in this context, is part of a pattern often used in phishing or malware distribution. The PDF structure and embedded artifacts suggest it's designed to exploit vulnerabilities or trick users into visiting external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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/~3/5VO7y1TeAqQ/square?utm_term=monica+baby+that%27s+why+i+love+you+so+much
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e940dbb67368755968bddf/1625899227799/zisalawizutek.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efd8911e1165054c923a2c/1626331281257/iit_foundation_books_for_class_9_physics_free_download.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9e0777250868136f360c/1626119687896/ligujapobeta.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edb2f6d2d00a35b8d24fbe/1626190582340/99170517799.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f09fbc3d7abe4f5144e7a8/1626382268898/what_do_the_initials_who_stand_for.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec88b6dbb514329fafaaa0/1626114231063/forasorenozobizena.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f08c2d522b2a00fe720e3b/1626377261210/50260421788.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8c6492b8982254c497cab/1625867849249/12th_commerce_digest_download_2020.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8c4c4b825900159c22255/1625867460785/15297520963.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_off0000ddda.bin
7c289a41e6e021f5cb28955171fa2342316b490da43cb16f3b2cb8040910dc5a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 16604 bytes
font_01_sfnt_off000108fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108FE 16792 bytes
font_02_sfnt_off00012115.bin
97bd5fa441a6e03428d8904bcb4459c7feb1fbaa3497ac7e149c015901008b79
pdf-font-stream PDF embedded font (sfnt) at offset 0x12115 10928 bytes