Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89f4db770fb8f8a…

MALICIOUS

PDF

75.7 KB Created: 2021-07-12 23:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd1ae88898ad89881a5fddec57f69dd5 SHA-1: d97a73bc45017af53b02244345cb50ba9154f850 SHA-256: e89f4db770fb8f8afbb4c9a14d2d6718516b877456649cecd549f4e49e2ce307
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a visual download button and embedded external URLs suggests a phishing or social engineering attack aimed at tricking the user into downloading a payload. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/CHqDoFjlE84/square?utm_term=raees+full+movie+free+download+filmyzilla
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e85b061058ba59989153ec/1625840390960/strategic_management_audit_is_known_as.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9043c2c5c2f6215c7dfce/1625883708200/23111201875.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e932db8ce0e10532d34168/1625895643948/86084107032.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec83efc217102653d64f20/1626113007933/nulewunedikalu.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e4fce6bd1231e604af0d/1625875708401/83876876468.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e779ed52db4a70f0fe3c49/1625782765373/fijexejiwepuw.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec855f8300fd66e196797c/1626113375981/have_in_present_perfect_continuous.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_off0000c7a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A4 16792 bytes
font_01_sfnt_off0000dfb6.bin
e98b6c40892ca61be3abf465a7530ff96768c2b16f2b567d75f6bc41a97380a7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 16192 bytes
font_02_sfnt_off00010992.bin
dc95437b3d751420542e9cecc7a287df2939740c326474ba1938b864818e8353
pdf-font-stream PDF embedded font (sfnt) at offset 0x10992 10888 bytes