Malicious PDF — malware analysis report

Static analysis result for SHA-256 9277f2c8365d7402…

MALICIOUS

PDF

72.3 KB Created: 2021-07-19 02:36:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b475c6e90cca321aa45f1c36c99d1bd6 SHA-1: d25032e092618939825224085229fa863e81ea2e SHA-256: 9277f2c8365d7402f0d788d2f28fb9670ba20cd5358cbe565fa6eb6e5a1034e5
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, with a heuristic indicating it's a password-protected archive lure. This suggests the document is designed to deceive users into providing passwords or downloading further malicious content. While no scripts were extracted, the presence of embedded URLs and the overall detection pattern point towards a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.2209

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/cEZ-xJcQpFE/square?utm_term=complete+ifrs+pdf+download
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edb9e30999c452037503f2/1626192355548/15087525816.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f4a14a36db646251ae5461/1626644810130/can_you_not_go_to_college_and_be_successful.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_off0000bb3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3A 16792 bytes
font_01_sfnt_off0000d34c.bin
d69ed172270cdc906686d39f87eb4bf551d07261517773fcc15b203fef377f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD34C 16036 bytes
font_02_sfnt_off0000fcb2.bin
01e01b5e7016cd47a6dc99e3560616b207be2299b17231221da8c8d9bbc5318c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB2 10776 bytes

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