Malicious PDF — malware analysis report

Static analysis result for SHA-256 204f783f9781056e…

MALICIOUS

PDF

102.5 KB Created: 2021-07-12 20:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccda55880106bf54269d11b5e67132b4 SHA-1: 474af85de9cda762a4ce4ed481f278331dd39def SHA-256: 204f783f9781056e510da8f7320347f69bc339ecc2b310899ae670daa0c6fba3
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, with heuristics indicating it is an advance-fee scam lure. The document body is heavily obfuscated, but the presence of external URIs and the nature of the heuristics strongly suggest a phishing or fraud attempt. No scripts were extracted, limiting further analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9734

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/-MXWpcYQ7kA/square?utm_term=what+is+the+greatest+common+factor+of+2+and+14
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec78563a853d606aeb459e/1626110039078/worksheet_of_weather.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8d4b300b83d0a108879f0/1625871540035/cars_with_manual_and_automatic.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e89e25a1edf75f7452a01e/1625857573183/get_your_hands_off_my_hips_before_i_punch_you_in_the_lips.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e78950d56f0f36126c5211/1625786704328/world_of_tanks_blitz_unlimited_gold.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d38f10585815137672d2/1625871247705/98682203186.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8492fda9c5376a3b77c84/1625835823903/49535950519.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7dce057d2352c927c7a91/1625808096428/72336665266.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e91312fc46b15058279cb2/1625887506264/gesasojebeniwirepuwuboj.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec80f112c1416d2f1a9284/1626112241401/all_none_both_neither.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012570.bin
bbff14d064b4ffd88258b7d51b89449cf076de728bfc127804e3448d04d83d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12570 17404 bytes
font_01_sfnt_off0001532f.bin
ca4a855a35f359f33b3559c6c40cb3f34c3b5d2b5600b3cc1dd462db15eedd73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1532F 1720 bytes
font_02_sfnt_off00015b5b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B5B 16792 bytes
font_03_sfnt_off00017372.bin
040f0617d51c3cc5bdab4fa6908e264631cfa435a3f3d8fc3d1884409f1ebc44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17372 11120 bytes

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