Malicious PDF — malware analysis report

Static analysis result for SHA-256 6665158094de92c5…

MALICIOUS

PDF

86.5 KB Created: 2021-07-13 08:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c93f903ed44b4a1ea659bc5056b3ba1 SHA-1: ea96c04a9809a696c022fadacff53cff3ad6b71d SHA-256: 6665158094de92c5d8e01f4366d5471c82851fa548c4fb832ccc7d6a23b3a2f2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as phishing malware. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/sq/ugae/~3/um1bUVUAM38/square?utm_term=mystery+riddles+with+answers
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c3454be6b65fb4b0ec04/1625867077780/eml_to_pst_free.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecfcaaf8b4e244e4f91b9b/1626143914651/high_life_full_movie_free.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec7961b6dedd3ae167cc37/1626110305988/download_call_of_duty_mobile_obb_file.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8772e8061cb7c4099733d/1625847599031/tafazazutisiketanojelizan.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e898200c40c50207923475/1625856032745/checking_for_battery_draw.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8f95f320dbd0de27f92bf/1625880927840/roxikifom.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7ee844aaab0286a8b5dd2/1625812612336/analyzing_graphs_of_polynomial_functions_worksheet_answers.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e812ffa431ed42d2fe2096/1625821951386/what_do_the_keys_mean_on_a_laptop_keyboard.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e943fd854c1d3b348800fe/1625900029424/nuchal_translucency_down_syndrome.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec798354a52c186ce3da48/1626110339291/capture_card_not_showing_up_in_obs.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7ff03e8ef4d41b4fc3177/1625816835223/88833439200.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_off0000f1a2.bin
dddff3ef59b049cab8c9f133856b5ce46650cb9757a4dc416f43e746f9ad3e64		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A2 10416 bytes
font_01_sfnt_off00010937.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10937 16792 bytes
font_02_sfnt_off00012149.bin
7c22f53a7f2b0fde1ee7a2b844467baf2b424d822c680c9ea86f9c415c156e91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12149 17172 bytes

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