Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac03168c0913065…

MALICIOUS

PDF

83.5 KB Created: 2021-07-16 12:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a4bfcdb22abe4d1943fbf6f921736658 SHA-1: 271426eb7ce9beb449ee5a6e22251ab357f14bae SHA-256: 7ac03168c09130653c0981b52d3b48ee26dfa91cf9aaca219df312a04f54f52e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains embedded URLs, one of which is a feedproxy link that could lead to a malicious site. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest an attempt to redirect the user to a compromised or malicious resource, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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=subchorionic+hemorrhage+miscarriage
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed9b2fcd0cb17c762e8d83/1626184495665/ripenijusinoromulumot.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edeb4fe11d817478d37671/1626205007078/93882747666.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed9a403680ef421b546981/1626184256365/too_often_meaning.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f018e0cd1cf129e16478fb/1626347744280/56729199694.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee25d4fb3cc800db53b9fa/1626219988365/segujixofajoluxomij.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_off0000e3ef.bin
a75f99e4323fb901380b09cadd97b19d52ff42e4fb43b2f9bb1ab0928b9ff98c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EF 17660 bytes
font_01_sfnt_off0001110a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1110A 16792 bytes
font_02_sfnt_off00012921.bin
22178c0fe907c61404c3b28d16e0c13fd7fa96271a5c47db9365573b1a10359d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12921 10848 bytes

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