Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc1aa96da98c40a0…

MALICIOUS

PDF

80.4 KB Created: 2021-07-14 06:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d174b53fecde063ddafbde27153c88ec SHA-1: 5b4562319891bcbc6ac0d1c2fa3f57f0ae88d832 SHA-256: fc1aa96da98c40a0fbc29c9c06af0d5f1a73751a3366bf893ac0805b086bd207
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs within the PDF structure. Although no scripts were explicitly extracted, the PDF_URI heuristic suggests an attempt to redirect the user to external content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall pattern points to a phishing or malware delivery attempt via a malicious PDF attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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/sq/ugae/~3/gPkW7oTCsL0/square?utm_term=tell+me+a+trudy
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee3a152a4cda17625dc51a/1626225173302/how_to_write_in_standard_form_math.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edd9d1172ba47bdac32256/1626200529902/physics_reference_books_for_class_11_free_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8c56478ebe26bfc6070e/1626115159266/vuwopivafeloxubusowumi.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_off0000d987.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 16792 bytes
font_01_sfnt_off0000f199.bin
d276ef7bd9e2119aa4380e3285b2ee2931d3c95d12e6aab2a49dfd76924cbd08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF199 17188 bytes
font_02_sfnt_off00011e5a.bin
32fbd2f8bc4212a3eb40a8e6afc16aa933f75a67ee9107a5d6ad25edc6968649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5A 10104 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.