Malicious PDF — malware analysis report

Static analysis result for SHA-256 075adfbcf9caba4f…

MALICIOUS

PDF

77.8 KB Created: 2021-07-13 16:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff82c2cc61cca0cfbdf08061fa7fcc83 SHA-1: 9decbd64600c3000f62fe2a9bd52bd864170340f SHA-256: 075adfbcf9caba4f6de2692aff84724621e519705988ecebaab5ae93fd720f8e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL that mimics a legitimate search result for PDF editing, suggesting a phishing attempt to trick users into clicking it. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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/~3/1LSSs5qy-i4/square?utm_term=how+to+edit+a+pdf+on+mac+preview
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e90ebf2210ba6bce116b24/1625886399262/sudagatepojorada.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ff7e19a9f87deb716a89/1625882494676/91284904381.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8ff95f8bf969071ece67/1626116090134/96207743878.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_off0000cea9.bin
95c9273135c2567198ee7d14452146e56b957536b940a50a0605715facee05a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA9 10708 bytes
font_01_sfnt_off0000e73a.bin
c0fc2aa7710ca5e1f6581c4f3e7eecebbfab66efab3c30d350fa5db31c2ad994		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE73A 17060 bytes
font_02_sfnt_off000113ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113CE 16792 bytes

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