Malicious PDF — malware analysis report

Static analysis result for SHA-256 312880ee14dff2bb…

MALICIOUS

PDF

79.0 KB Created: 2021-07-17 16:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e37313ab8fa1a22ba75b076bf7dfe7e SHA-1: 05b6d977d871489d8aec5beb151f8cb0903c2861 SHA-256: 312880ee14dff2bbc5018608e1d6830ac940eabf6e154ec3e97b6d3aa4f87ee3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs that are likely used to redirect users to malicious websites for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to exploit users via a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8740

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/mHcMeCcfVl0/square?utm_term=fawn+lake+campground
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee29dc0b33b63bb8c46f6a/1626221020893/relebuzanojisona.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91929787dde1a90adbc22/1625889065531/11188808702.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f00502fdf15601434ab688/1626342658161/zulalalasejaxebi.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee93312ee8b51fd939c399/1626247985360/21789636288.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c751adf2c26882ffabe7/1625802577481/nazomopovolozewolafupafes.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8ae3d8a680031d702ce54/1625861693452/sync_icloud_calendar_with_iphone.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_off0000d45b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD45B 16792 bytes
font_01_sfnt_off0000ec6d.bin
64319547b31f179caca00cded84abd9373551554eef0b4ed847a13795dfdf46e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6D 16848 bytes
font_02_sfnt_off0001179f.bin
0efe8d969721849894093f4f81ea4bf9aaaca5856e76f042a5eb8819169d8040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1179F 10752 bytes

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