Malicious PDF — malware analysis report

Static analysis result for SHA-256 801e71a0fb4280b1…

MALICIOUS

PDF

80.5 KB Created: 2021-07-16 07:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db5edc74aa482f2b4fe47f3d260df7b1 SHA-1: 70268093153b87b96e1d7a52f47ae6c937fabc39 SHA-256: 801e71a0fb4280b1fb9f55df33d49e2cdd8f34923bb8b3677bfc7450935980ed
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically one pointing to a Google feedproxy, suggests an attempt to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9511

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/RVI1sXQGPkU/square?utm_term=board+of+technical+education
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e79a19dbc52028c83bc3e1/1625791001959/97470279373.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e87c2fe22ced7daae21301/1625848879781/morabuwego.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f104fc9b6f23611955217a/1626408189056/chapter_6_test_answers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7b8738592fe3a589008e6/1625798771101/family_life_cycle_approach.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee80c4db6052518eca306c/1626243268714/regeweponi.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edc1c07ce58f02ed90b732/1626194369190/32783742013.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0e89378fb23041afdc11e/1626400915678/77082334943.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee83a52a4cda176261d72f/1626244005478/electrolyte_replacement_therapy.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_off0000d874.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD874 16792 bytes
font_01_sfnt_off0000f08b.bin
974898665558bcd60f2672b1028a1f85db29a2cb3d83d236d624cd01e75d82cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 10560 bytes
font_02_sfnt_off0001087e.bin
3e89f2c7c6a9c9671406c41899f591515db54e5ab4000dbe693d7ea0868d40ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1087E 17528 bytes

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