Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1be27ee2cdfd115…

MALICIOUS

PDF

73.7 KB Created: 2021-07-19 20:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 571d6347505197ead33b115bb91989f2 SHA-1: 688c5dd8f1273eff761813b6d1e5b5dfe2549d4f SHA-256: c1be27ee2cdfd11596834ec844081b2fdf60b291b074cfa65cc1a2bf9542d038
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, although marked as benign in this instance, suggests an attempt to lure users to external resources. The PDF structure and metadata are consistent with documents used for phishing or distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7882

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/~3/5JeRQhMeIYg/square?utm_term=simple+maze+for+kids
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee29dc0b33b63bb8c46f6a/1626221020893/relebuzanojisona.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e771e3a497014f3d5a1292/1625780707245/acsms_resources_for_the_exercise_physiologist.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f29a0dc5d9e6782cd982a7/1626511886118/heartgold_and_soulsilver_rom.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1bd7e9a1b915b923cc105/1626455422781/death_race_tamil_dubbed_movie_collection_download.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_off0000c109.bin
00097f28852b34ce661f4f17a6b80b3804333301ff8effc99033911f3d60c38d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC109 10684 bytes
font_01_sfnt_off0000d98a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 16792 bytes
font_02_sfnt_off0000f19c.bin
fa0f98dcd43b0252fabeae174c5ffa8459e09eeb251c7294dcbc995210824552		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF19C 16140 bytes

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