Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95824b86ef1b299…

MALICIOUS

PDF

73.9 KB Created: 2021-07-18 03:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86c02ae85b38eb5df786b45670d47af4 SHA-1: 103369f8400cb8c0a4fdb805fcc54bbaf361ad1a SHA-256: d95824b86ef1b2990d042ef5f37070064d27ad55f07d46940b2a42a95b6d452d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that likely serve as lures for phishing attacks. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/~3/7R6buoffwiA/square?utm_term=how+to+get+ink+pen+out+of+pants
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f06ffe488f8042adac7ef1/1626370046856/fat_kid_laughing_gif.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f359122be78d52659bf742/1626560786879/88128507293.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec937d69d4b63361484ec3/1626116989405/gta_vice_city_swimming_mod_download.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7c310687a3d659a4af78b/1625801488915/the_facebook_effect.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9155119a9f87deb726cec/1625888082090/are_brown_rice_good_for_weight_loss.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_off0000c395.bin
4366ed93d36be23c98f83f62a28dbe1bd262c4b900c17c1410af7e5c983ebdd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC395 10656 bytes
font_01_sfnt_off0000dc34.bin
4e4dd8eba721d76d52237ce993c4020aa8bd060f43846b1fc9a17f96524dfae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC34 15400 bytes
font_02_sfnt_off00010388.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10388 16792 bytes

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