Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5fa18b60aa9b58…

MALICIOUS

PDF

82.3 KB Created: 2021-07-16 13:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d746103d252346b70a101780e10daa10 SHA-1: cdfa58cfa8f42bca051f64e68ac1f02dc382161e SHA-256: cd5fa18b60aa9b58a736d02f730c0d91cad3d05aa3e581b971c0a891d6b5158b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple engines, including ClamAV and a machine learning classifier. It contains embedded URLs, suggesting it is used for phishing or to distribute further malicious content. The presence of PDF-specific heuristics and embedded URLs points towards an attempt to trick users into visiting malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/RVI1sXQGPkU/square?utm_term=application+of+computers+in+various+fields+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ede5e57979814f85a92bd9/1626203621611/causes_of_paresthesia_in_legs.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f064f72201fd657d0096ba/1626367223801/best_pet_frogs_and_toads.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e86ef4f9d8d7554bf2641a/1625845492940/sovepinedivup.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f055b738786901bd9bd80d/1626363320399/91084202868.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1475f15846f0d14ec5578/1626425183613/69396023155.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_off0000e20e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE20E 16792 bytes
font_01_sfnt_off0000fa20.bin
4c7b33d4e33e7398f4cdcfb51b18ebcc7b23b544f7be5a0857c63a2ea7b6d759		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA20 16020 bytes
font_02_sfnt_off0001237e.bin
641ec4e3dc1f20da2f0f025374498cde2e91f6c021869f611c20b0bd337e5587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1237E 10928 bytes

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