Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcba37c688b9c249…

MALICIOUS

PDF

93.1 KB Created: 2021-07-13 11:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5e5d6c1626141b7593c6881cdca3de35 SHA-1: e6adcb80e948fe2afac1e06048d525ca7a03194e SHA-256: fcba37c688b9c249ead7a30695efad3603ac56d4e8e25c5dd49eacd43bbd6fe4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. The presence of embedded URLs, despite some being marked as benign, suggests a phishing or credential harvesting attempt. The PDF structure and embedded objects are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8712

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://feedproxy.google.com/~r/sq/ugae/~3/J-SxIuB37Ms/square?utm_term=the+masque+of+the+red+death+film
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed19607ab2906137d294db/1626151264745/lego_star_wars_the_force_awakens_codes_red_bricks.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7cc0969e16759cf750763/1625803785967/nifitekolebamenabijugu.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed2cf7fb5306426ecc1c0a/1626156279626/1578452989.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e832214aaab0286a8e4424/1625829922003/second_grade_reading_comprehension_passages.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7901cefb14d11220cbaa7/1625788445003/35698783696.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec952e69d4b63361487fa2/1626117422560/youngs_chinese_food_carryout.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec807bc217102653d5e48a/1626112123173/23765255760.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_off00010a4e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4E 16792 bytes
font_01_sfnt_off00012265.bin
3bdc689db13f6fea27f242528f2a0d1659770fac7eb666f73c217b87a8e343f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12265 10724 bytes
font_02_sfnt_off00013ac9.bin
885d410e9e10b5deea52247613e68dbd71bf417d6fa6d637f6426f479ea8c167		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC9 18204 bytes

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