Malicious PDF — malware analysis report

Static analysis result for SHA-256 faef459e89d56ab3…

MALICIOUS

PDF

156.3 KB Created: 2021-07-16 23:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3c7141d5e14f9415d2fa679bbe3dab5c SHA-1: 122c4a1c5bc473fcd9e8f1f9970cf5d3173dc0a0 SHA-256: faef459e89d56ab3dd4cc3ec0c15858ef25583251e942da1f81ec4fb5c16deee
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs, one of which is presented as a 'cell organelles webquest answer key'. This suggests a social engineering lure to trick the user into clicking the link. The ClamAV detection and ML classifier indicate malicious intent, likely to lead to a phishing or malware download site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5322

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/HbdJGeoIq_s/square?utm_term=cell+organelles+webquest+answer+key
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed5d7ac50d503b9d57602e/1626168698425/shadow_fight_2_hack_version_for_android.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee82f1588fb56695185e56/1626243825738/roger_craig_jeopardy.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e9439ac22c005c9339c187/1625899930572/xizapezinubagomutugaxu.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edbe0f6d720f75fb5d191d/1626193423415/how_do_you_remove_marker_from_skin.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee830efc191471fc70404a/1626243854450/fatunexinigapajofebeg.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e85f2ba9234c0427a17e06/1625841451442/93212990158.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e90059e6a58043b6902b1b/1625882713952/31925184349.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_off0001ff41.bin
2bba653b0da9e211ac8002ced31ba7d68fe5c40f36ce6ff8319f5e8f19a58e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF41 19432 bytes
font_01_sfnt_off00023349.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23349 16792 bytes
font_02_sfnt_off00024b60.bin
d7b59d1e13db4fd2905d94f9d38b71241de018b6e7a15a639c81f4532bc1d196		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B60 10900 bytes

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