Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f497c2a6e32f39…

MALICIOUS

PDF

76.2 KB Created: 2021-07-20 16:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7087596c62a25f1073201bb04a7960d SHA-1: ccf14119ef1b75464dc1fc08bdde3abb804c2897 SHA-256: e5f497c2a6e32f39539df597fcdfa6f84a3f4b676e301f30afff48814784f943
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains embedded URLs, one of which is flagged as potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7056

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/~3/5VO7y1TeAqQ/square?utm_term=blue+laced+red+brahma
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f094d49287a77470799114/1626379476734/the_storytellers_new_voices_of_the_twilight_saga.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f68eead7756961bad60a3f/1626771178719/wusepibik.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee800c7dee9f188f7c2981/1626243084502/sukulogufugili.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3330dcba7b71501e5109c/1626551053677/aylesbury_is_in_which_county.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_off0000c70b.bin
6fa179fe04ac9bc636748ade6211910af285a33cf2920999b19228aad5492bf8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC70B 18432 bytes
font_01_sfnt_off0000f45c.bin
b19d5c03c1a2f03c20dd625a648d98557864aa7bb45a4c9111640cd2a9301fbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF45C 10344 bytes
font_02_sfnt_off00010bab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAB 16792 bytes

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