Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4f6f12260787a1a…

MALICIOUS

PDF

78.0 KB Created: 2021-07-21 14:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb3695210d0729cfb5e8d87488b2e0d5 SHA-1: 0e4da5f6097599b57b2f0ee710e6cb736b84054d SHA-256: b4f6f12260787a1a789df742d561b05ad92196f1edd5e9f413eb80620191e0df
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded URLs that point to external resources, suggesting it may be used to redirect users to malicious sites or download further payloads. The presence of PDF-specific heuristics indicates potential exploitation of PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9701

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/~3/0YvHz_IItD0/square?utm_term=parentheses+inside+of+parentheses
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2da9351c2e860984a0126/1626528403620/why_do_i_not_get_bit_by_mosquitoes.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecac5e8c19ad4998deee9b/1626123358393/pith_ball_gizmo_assessment_answers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f382bfdb752c5e49ade87e/1626571455120/my_life_beautiful_quotes.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f2943e9dfa584dc9d6c91f/1626510398170/legurejiletepefafotusol.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f7f9bb21ad5542cd09b344/1626864059531/vowikupajedid.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec9db20e7a3c5fba3ff32d/1626119602978/empowering_employees_meaning.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f3f01d6c177f33d7a8a3fd/1626599453747/sims_3_packs_free_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e779fc03218153ce066f5c/1625782781080/benuromorag.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_off0000cb14.bin
9152f7a37ec2e552e30e3bc50586a11463c21fcc4bee2249f718d44dd43b018b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB14 10548 bytes
font_01_sfnt_off0000e30b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE30B 16792 bytes
font_02_sfnt_off0000fb1d.bin
a91d9835988ba68cebd67e2fdcc73e04f35988dc2458353bfa742ae7dd4fdb88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1D 18080 bytes

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