Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91fa57500615cd9…

MALICIOUS

PDF

88.0 KB Created: 2021-07-16 15:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77d6bed0b6f76e6c7f37af88794d0f71 SHA-1: b417fa06fbed990a8b955567facce67e99748859 SHA-256: f91fa57500615cd9b0c4764e75a97c135292327c5d8e7eb53583eaf7d82cdde7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of an external URI suggests an attempt to download or redirect to a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8239

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://catamma.ru/square?utm_term=what+order+should+i+watch+the+marvel+movies
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed9256c2b47a6141a52c0f/1626182230418/push_come_to_shove_meaning.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee1f9f114e6b7b7de4a56d/1626218399368/88907687931.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec96c445711547b6a7f4c9/1626117828971/diy_candied_fruit.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e937b12210ba6bce12e75f/1625896881595/chatrapathi_audio_songs_downloading.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e881b2455dce08fe7d3da2/1625850290580/sub_sales_property_meaning.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee3c8d114e6b7b7de6dbe5/1626225805767/77313931670.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_off0000f6d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D9 16792 bytes
font_01_sfnt_off00010ef0.bin
bcd0fff0fb424edce9286dd14d5a4ad93a5244969ba078d126235294d1c4a5e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF0 10776 bytes
font_02_sfnt_off000127d5.bin
c1b27112ae15134512d51e382d54619a4c7ca03a05ff29b4823dfe8294915db8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127D5 16848 bytes

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