Malicious PDF — malware analysis report

Static analysis result for SHA-256 98cafbaaf4d867be…

MALICIOUS

PDF

79.2 KB Created: 2021-07-13 23:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 749293989716da662f1f686666993314 SHA-1: f7e6803b777c7aa06cbccc1979866077b2a4bfaa SHA-256: 98cafbaaf4d867beab9b7854b3f7620f685dfee43d5b39adef539566fd59d8c7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is flagged as potentially malicious, suggesting a phishing or malware distribution vector. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to exploit vulnerabilities or trick the user into visiting a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8621

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/um1bUVUAM38/square?utm_term=moon+in+12th+house+taurus
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8260cba333063f17b8f88/1625826828736/english_grammar_and_spelling_checker.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec9b101d0b393375530f84/1626118928885/the_meaning_of_eye_contact.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e918a9320dbd0de280b6c3/1625888937594/lokobiremadosanisomevizat.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eda5831608af7c639e0256/1626187139193/the_king_of_fighters_wing_3.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ededd4e83f616bcf8470d4/1626205652818/which_elements_are_least_reactive.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_off0000d60c.bin
0d15a12c46b6bca71e6f280588ecf3ec46dead8be69babc688f8774cd750c488		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD60C 10424 bytes
font_01_sfnt_off0000edc4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 16792 bytes
font_02_sfnt_off000105d6.bin
050896372700f8f8f318e0eed5837044c899a78efc10b65a055f20c7f1ded6b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 16116 bytes

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