Malicious PDF — malware analysis report

Static analysis result for SHA-256 931baebd87ff7556…

MALICIOUS

PDF

77.5 KB Created: 2021-07-15 13:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0f9d3b9763be4e015e69a888f8b33a3 SHA-1: ce929cca41916689ef66e86a95d1d118b2babe64 SHA-256: 931baebd87ff75560104162d924222101dd1345a263530628afc924607b4b889
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to external malicious sites, likely for phishing or to download further payloads. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9275

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/gPkW7oTCsL0/square?utm_term=what+do+queen+snakes+eat
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e84c62da9c5376a3b7b015/1625836642625/fakujam.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e939742a6f785f5835271c/1625897332807/70653519938.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7c06780504e0a7767fdc2/1625800807760/class_6_assignment_science_5th_week.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eddc333be50f2c5dad5ed2/1626201139600/how_to_see_who_stalks_my_instagram.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e89652aee77839d05d2651/1625855571174/afflict_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d6c3a5e1975eb3931776/1625872067653/normal_hematocrit_for_men.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_off0000cdda.bin
8f9adfa530f1e11e2b7645be73f2c18e008105a161407d9f0d0f9f9af7a76cab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDA 10440 bytes
font_01_sfnt_off0000e550.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 16792 bytes
font_02_sfnt_off0000fd62.bin
41540b73087636db129e4c550927fb89396d027ba77aa0cf03f7d937db36dcd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD62 17204 bytes

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