Malicious PDF — malware analysis report

Static analysis result for SHA-256 21bfab9e51b206ab…

MALICIOUS

PDF

83.4 KB Created: 2021-07-12 20:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7795ee33f10f84dab7c076fd55f67ee SHA-1: 1ea2b66cbfa5cb60b1b7102553854d214968be1d SHA-256: 21bfab9e51b206ababd9e3f5e715c82bd34f787c44feeeb39f9314ee5dfae2d6
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 phishing or malware delivery attempt. The presence of embedded URLs, though many are confirmed benign, suggests an attempt to lure users to external sites. The file's structure and metadata are consistent with malicious PDFs designed to exploit vulnerabilities or deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8981

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/v-xubMviL4Y/square?utm_term=stocking+fillers+for+students
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e87734ce4b197211de4c2e/1625847604529/2020_federal_income_tax_form_1040.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e94fb4b630645a0ef8b747/1625903028215/professional_sharepoint_2013_administration.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92be48ce0e10532d30b49/1625893860743/14254043741.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e49a309bd63f3d82e49c/1625875610264/level_7_brain_out.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e77174ec34f709ddbde594/1625780596969/the_family_tree_of_jesus_christ.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9617ec22c005c933a88da/1625907582319/one_piece_stampede_english_dub.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8f22ccc7c08645924d6fc/1625879084166/flapjack_with_treacle.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_off0000e23c.bin
59e7b58099f632271383fbc7bb2103eb70df100a1c051971ebea1d077fda33d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE23C 10756 bytes
font_01_sfnt_off0000fae3.bin
964fdb790c8f658bbde820a0735d3446f453b7401ed56f932a1a574482e6f168		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE3 17368 bytes
font_02_sfnt_off000127f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127F9 16792 bytes

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