Malicious PDF — malware analysis report

Static analysis result for SHA-256 b935380dffac4600…

MALICIOUS

PDF

94.2 KB Created: 2021-07-17 02:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b6766f1b12a89433052876017d1e3039 SHA-1: eb43033f20491c2813e14fff0b9e4bf9ba17b380 SHA-256: b935380dffac4600b41744519576a89a3a6ceeda21ad22b99618e43c43d994f8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and also triggered ML-based detection. It contains embedded URLs, suggesting a phishing or malicious redirection attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely to lure the user to a compromised site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6187

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/razvivatel/yapz/~3/UQ8tT55rDuk/square?utm_term=dream+about+naked+man
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e872ae62e6514f6905ef67/1625846446145/reading_passages_with_multisyllabic_words.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7d436ad76c09748f8bfa/1626111299226/watch_the_haves_and_the_have_nots_season_8_episode_6.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f01711177a4e2836d465b0/1626347281200/fizuxibavojurovaxe.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_off000116e2.bin
7790039fd3304f41027c853d693f79f3af6b95e25ae82ecb462991e6567a15ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116E2 15588 bytes
font_01_sfnt_off00013ea9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA9 16792 bytes
font_02_sfnt_off000156c0.bin
42f36b8cfd1baae5a4eb6b1e12f817c7f27cd98ec24d10ec8d139839f2b3f6df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156C0 10436 bytes

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