Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e6c0916e477d488…

MALICIOUS

PDF

80.0 KB Created: 2021-07-18 08:48:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 059d6a77c6201bee9d04f693f7fb1416 SHA-1: 260bc7dd9c1eecadb0f7271b882ce303155b53f6 SHA-256: 8e6c0916e477d488ec86fc14d041cab52c7145546b0700c6b9422a59672e7969
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 suggests an attempt to redirect the user to external sites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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/iXsW93xxTQA/square?utm_term=syncope+while+urinating
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8e83d2210ba6bce0f546e/1625876542131/jufuzizisasikaw.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edb5abc8cbd011b90e2860/1626191275703/72951289963.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee39bf2a4cda17625dbbc9/1626225088090/37835521886.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7ac927be683581ce035f6/1625795730885/official_abap_programming_guidelines.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edfed6e7c05a53525a67bb/1626210006309/find_the_area_under_the_curve_over_the_interval.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e8752dabf27235516619/1625876597551/66140090584.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec89a6f89f8e700bf8177b/1626114470445/22378997886.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e90d04f492d21a0f6a1ad4/1625885956290/77112865298.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e84689e41cee5c0c77f868/1625835145318/benekebozamasuwutekonom.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_off0000d6c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C1 16792 bytes
font_01_sfnt_off0000eed3.bin
a1fab02ab7caee15b8706277ebe5e66ff10a5795e806b8709d1ad3ecac24c77f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 16892 bytes
font_02_sfnt_off00011aed.bin
3fdb89ff3606822cee40cef5e13f1bb259fa15afa5d5eefdcedc38d7eaadb1a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AED 10860 bytes