Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc76e4c0f6709b86…

MALICIOUS

PDF

85.9 KB Created: 2021-07-17 15:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fbb894fd3e3827445b75796d70bab415 SHA-1: 22396fb09be9e39cd576c2ab3b5cca0e64cd6b04 SHA-256: bc76e4c0f6709b867d6ddbdcc69127943c3057c87eb67f271da8942ca8391dfa
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests a phishing attempt, likely to lure users to external sites for further compromise. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/nCRFBnYrBHY/square?utm_term=hilarious+test+answers
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f19d697a384335d6d14420/1626447209994/a_group_of_swallows.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7691adaeda25844ee1a9e/1625778458703/2653797954.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f24a1ac2d40e67ec0025a5/1626491418677/85743750701.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e81090ce8457037ee4ab7e/1625821328490/55817875774.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e861be732d3c6921e98040/1625842110352/a_quadrilateral_with_rotational_symmetry_of_order_more_than_1_but_no_line_symmetry.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e82495afd06e4982ed3d91/1625826453713/five_nights_at_freddys_ar_special_delivery_download_free.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f26bdd9dfa584dc9d5b50d/1626500061852/zobavabapufogiza.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7a1854261ba79805e01e4/1625792901152/weightless_by_macaroni.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f21d59d9389f5e808127ee/1626479961599/17895170502.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f0aa7298358e582fa34c1f/1626385010453/command_for_levitation_in_minecraft.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2bcc65f13a15bd817a2a7/1626520774275/36054369047.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_off0000f1f9.bin
ef465124b5566e7a3d561099f0510cd72528b4898ce48666f840997e0426f785
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F9 10280 bytes
font_01_sfnt_off0001093f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1093F 16792 bytes
font_02_sfnt_off00012151.bin
7bd3dc62e7c9a3af569a82c00f7b87aed169b9548e5c938d296f87ed4b1f7aa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12151 16268 bytes