Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa20dee0456ff586…

MALICIOUS

PDF

77.5 KB Created: 2021-07-17 05:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 011c8968a387810cd969cdd578a24c4e SHA-1: 077cb72a4f621c3ba633296e18c339b30b7419a7 SHA-256: fa20dee0456ff58680b697fb28e3c19a8e053bf141a819a4ea1a3bf5d5229605
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs and the document's structure suggest it is designed to deceive the user into downloading further malicious content, potentially through a phishing or social engineering lure. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8791

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/gPkW7oTCsL0/square?utm_term=modal+verbs+french
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f1399f8cd1ac765d4fbade/1626421663118/zuxumojojefaxutisimewi.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e78ffd80504e0a77651cd8/1625788413265/35ad_of_income_tax_act.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efd88db37dc55b034e6571/1626331277798/bukuduf.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f202472347b801e9d9e24c/1626473031674/kavurulebavogaremolipe.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f20a051d82da67a39b892f/1626475013902/cxc_chemistry_past_papers_with_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_off0000cd10.bin
39e8ebd5857406c202c6eba3941a6599e31ab134703e3ed32e643d3428457755		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD10 17252 bytes
font_01_sfnt_off0000f8f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F4 16792 bytes
font_02_sfnt_off0001110b.bin
bacb4816f4e2889a41a5f051729b54375558ccbd8828bc1f2590cdf483a1c87f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1110B 10584 bytes

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