Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6b90b10b4685db…

MALICIOUS

PDF

74.5 KB Created: 2021-07-13 17:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1101b67d3a839262dde639923d1ddde SHA-1: 03e2a521dc6683c6a4d1f31a2fd9aa812f102fa1 SHA-256: cf6b90b10b4685db02c32aa902c1cfff120b10a1c76984dce462450de4c8772c
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 likely lead to phishing content. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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=income+and+expenditure+account+is+a+real+account
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eca4633080d76c7a53fcca/1626121315206/wekigolunenutadetexuzid.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8d6bdef1ca41d5f9c30f/1626115435433/tubemate_exe_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e949f8c4c1a734c5d82a7a/1625901560892/pokemansion_fire_red.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecae24f9f3f24b30c4b427/1626123812774/hetter_heating__cooling_reviews.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca75f7a6a1626764c29ed/1626122079651/increased_muscular_strength_endurance_and_motor_fitness.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed8d66bc9b4721000ecbea/1626180966567/apk_for_minecraft_pc.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed9dc45860d606f4827757/1626185156323/xelizowaravek.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_off0000c4c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C5 16792 bytes
font_01_sfnt_off0000dcd7.bin
c8d2ecb7411c9e688eb8e92bc3733b8b5ac818fb0572ba8a06c5d68e643f7554		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD7 15548 bytes
font_02_sfnt_off000104af.bin
6fc9250ac0a840d6a22657911c9c1409b65169841350caacb454fe646ce9e1fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104AF 10828 bytes

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