Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d45ef62e4688da…

MALICIOUS

PDF

73.4 KB Created: 2021-07-13 23:52:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f2e908641e5e4204f551deb8a583749 SHA-1: 71545fedf28fbce7741b2945582075443d424305 SHA-256: 97d45ef62e4688da1c808180c6bb30db0ec08429d6c288dc1c96e26332f1e80c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a PDF phishing trojan. It contains an embedded URI pointing to a Google feed URL, which is likely used as a lure. While the URL itself is confirmed benign, its inclusion within a malicious PDF suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1869

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/pL_UGxDroB4/square?utm_term=present+simple+and+continuous+test
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec94a9bcf8be39b506b039/1626117289848/great_lakes_pharmacy_residency_conference.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edbafdd7feee1d98d6eeb6/1626192638019/food_for_the_ancestors_worksheet_answers.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_off0000bf45.bin
13d8716db0891f002b19be8fa1beccd503686f9d96fef81061852d9a993f6f96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF45 10776 bytes
font_01_sfnt_off0000d811.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD811 16792 bytes
font_02_sfnt_off0000f023.bin
46599fbcbf3a689b522ef7fb4fd4892131ae0960ff5f45114bb65e6218043519		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 16244 bytes

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