Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de64e7819a43319…

MALICIOUS

PDF

79.2 KB Created: 2021-07-16 05:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 76aa10ac870c24b72fe2cc8345ab9dc6 SHA-1: 7a944f6b33fecf2df9498711f5636c2290a0740a SHA-256: 1de64e7819a433197add3103f6de4f3c3a70ac891a53ae8cfd7076c837dd70bd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a phishing attempt. The embedded URLs, though mostly benign, suggest an attempt to redirect the user to external content. No scripts were extracted, but the PDF structure itself is likely being exploited to deliver the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6198

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/razvivatel/yapz/~3/nCRFBnYrBHY/square?utm_term=mcq+on+generation+of+computer
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e929408fb24157da705c13/1625893184933/helmholtz_watson_character_analysis.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee174ce7148d06bc6df705/1626216268446/mubipokuvikejufizojono.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecaa74243eac6055d2a3dd/1626122868453/jafesupos.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_off0000d3d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D5 16792 bytes
font_01_sfnt_off0000ebe7.bin
c3ecb5b6f193b0bf97d524234d17da34e2193389b6e876945080c7956891d8de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 17068 bytes
font_02_sfnt_off0001186d.bin
6fd90073ea5a8409793100dfa0e298ac996035019ae264f4b4286b9d4d29af44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1186D 10848 bytes

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