Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3436b790edda3ca…

MALICIOUS

PDF

81.0 KB Created: 2021-07-13 22:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75ad2c9fe8864e06d1583b9a659f65fc SHA-1: 51a74c4e0ea4cdc9f70d4a1c37f7e31a3167a56a SHA-256: e3436b790edda3ca79b734b16d4d7c8b03dd89cf172aa61ea6e442a09b509b15
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. Embedded URLs suggest a phishing or social engineering lure, likely intended to direct the user to a compromised or malicious site. No scripts were extracted from this sample, limiting the analysis of its specific execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8511

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/razvivatel/yapz/~3/UkUWPC8UKDU/square?utm_term=mentally+and+physically+exhausted
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e922a266be7e490f0fa98f/1625891490502/cost_of_labor_and_delivery.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e81e891d61f435cefa9d28/1625824905557/46041566377.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edd769e55429721e203293/1626199913570/35556403133.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92caeb132fa362073e8ed/1625894062442/river_stage_of_vaal_river.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7ee2b85664d35b0e83be0/1625812523437/wapulamuxolesasovalatug.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec94413631fd4ab8179672/1626117185091/96683704984.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_off0000dcfb.bin
e35804f2b13481660fc555f8f50a1170b6611cf5f00e3a644930316d1219f52a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFB 16320 bytes
font_01_sfnt_off0001073d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1073D 16792 bytes
font_02_sfnt_off00011f54.bin
7c779c4b78c6ddd080baaf9e54053cd81078e267f600414c847bc97e3a599a5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F54 10700 bytes

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