Malicious PDF — malware analysis report

Static analysis result for SHA-256 b86ddcd22a023ff3…

MALICIOUS

PDF

79.9 KB Created: 2021-07-19 07:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a12724c3f9a531f6f267b98430f6046c SHA-1: d89df1893d0831c066d879e21f069079169f9d1a SHA-256: b86ddcd22a023ff31888613f3839cf1362bf205d986dab473caf9cbad118b19e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is a phishing trojan. It contains embedded URLs, suggesting an attempt to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and detection suggest potential for embedded JavaScript or other exploit mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/S-4CHg4Qmwo/square?utm_term=dante+inferno+canto+34+questions+and+answers
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1792e5422dc4ac5c93f51/1626437935379/using_an_electric_hand_planer.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f142825142327a8742c5e5/1626423938990/vukexuxij.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4c15681f38b205897594c/1626653014968/cute_names_to_call_your_significant_other.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec79bd40121f566898f568/1626110397918/86749329634.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f302aba047b6361220d4b0/1626538668043/access_the_situation.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_off0000d87f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD87F 16792 bytes
font_01_sfnt_off0000f091.bin
a45f23a8deb2e2257078e4559923d259e07a2c533c6603c068d6a117810a2c4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF091 16088 bytes
font_02_sfnt_off000119d6.bin
85ded754a1d13ecb9226bed4206475b8e48fa87417a9d845e7bf39b3176d17b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119D6 11004 bytes

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