Malicious PDF — malware analysis report

Static analysis result for SHA-256 4774456266e9fedb…

MALICIOUS

PDF

83.3 KB Created: 2021-07-14 09:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff6387c9035b6183ed914cf8e2a909ad SHA-1: 70f6e1ebeffd6ade5c688938c834b6ce11a12c08 SHA-256: 4774456266e9fedb9c623b59348ab99ecb9eeee8dd04a2883907eb2b75c41b6a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains embedded URLs that, despite some being marked as benign, are part of a larger pattern of potentially malicious content. The presence of PDF_URI and EMBEDDED_URL heuristics suggests the document is designed to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5817

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/~3/4Ji06Fp1PxY/square?utm_term=chapter+18+summary+into+the+wild
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede4124ff81d3e2814dcc5/1626203154447/arcade_shooting_game_with_pedal.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee81dec27d1e40a54e2b4c/1626243550631/mexico_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee32b6c27d1e40a54978af/1626223286876/banana_and_carrot_muffins.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e773b14b2b7f268b9613cb/1625781169587/describe_the_difference_between_rotation_and_revolution.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_off0000e2bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BC 16792 bytes
font_01_sfnt_off0000fad3.bin
edead7e943badab8115df90631a610e3b0aa86b8413a76cbfd546d47d5b35221		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 11248 bytes
font_02_sfnt_off0001152a.bin
80472b1a26adb99769977ad0d3b9caa2229b688de585b4c24df09d75b528f7b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1152A 16944 bytes

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