Malicious PDF — malware analysis report

Static analysis result for SHA-256 c44d1c7ee829ee0d…

MALICIOUS

PDF

142.0 KB Created: 2021-07-21 04:53:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88dec570ae7f389a58f349abc7025a06 SHA-1: 1bfd53f6619a426a8210fe918cf9bea572b6e851 SHA-256: c44d1c7ee829ee0dc4be524d81d9b195d03a71ba718905094bdfc351ae590243
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, even if some are confirmed benign, suggests an attempt to lure the user to malicious content or download further stages. The PDF structure itself may contain exploits, leading to the execution of malicious code.

Machine Learning

  • Nyx PDF Classifier clean score 0.2315

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/razvivatel/yapz/~3/v-xubMviL4Y/square?utm_term=babylon+pictures+today
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed34fcff6d86145b9dd8d8/1626158333059/cold_comfort_air_conditioner_manual.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e93ebb787dde1a90aefe1d/1625898683522/biscuit_base_for_cheesecake.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed96c95e50ea0df8dfa576/1626183369875/piaget_stage_of_development.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f645ead7756961bad2dee3/1626752490971/19101478667.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec921c1cff58014d54e7b8/1626116636265/food_low_in_phenylalanine.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f13a068ed7c6554e7c29ee/1626421766386/beauty_has_no_skin_tone_quotes.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a83f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A83F 16792 bytes
font_01_sfnt_off0001c050.bin
22f7ec4f73286faf5b40eb057b90ef46c10e04b59a424cf5021ab0afb5f18587		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C050 16628 bytes
font_02_sfnt_off0001d7d6.bin
cdb52362ec66ca562385dc2c81b262fba646874de15c0ec6fe089fb7b2de8eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7D6 23100 bytes
font_03_sfnt_off00021260.bin
2232d912a4ee29bd3e0841c1495f33a0f5d3011c09843fb1e17cf4e2d43be099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21260 10916 bytes

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