Malicious PDF — malware analysis report

Static analysis result for SHA-256 8480455f29a32df7…

MALICIOUS

PDF

83.6 KB Created: 2021-07-14 09:36:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a8a2a7e89137425a96b27f63cc859a9c SHA-1: 26dbd2e7ba97fd341820d8a5d78d51869c621a4c SHA-256: 8480455f29a32df7753e77ad4a3a0fb62390ff7802bd52cf953fc183a3542cc5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan payload. The presence of embedded URLs, although marked as benign, suggests an attempt to redirect the user. The file's structure and heuristics point towards it being a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8790

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/kVSxLQpkboc/square?utm_term=accounting+internship+interview+questions+and+answers+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9163a5fa2eb14b90b41bd/1625888314747/gufemirazenowixamewojujo.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e88661526bc76d6b874164/1625851489660/99386948521.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7e45b6dedd3ae16830af/1626111557950/perikulamu.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edaebf7daf0c15b06afbe0/1626189503675/meaning_of_crumping.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8194cadf2c268820311df/1625823565080/35691947098.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ede119ac614e13d130267c/1626202393653/talk_about_with.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8b1a67baa26076bc9345/1626114843062/34477824297.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_off0000e445.bin
c5e69a819cbfebbbacaecff6ce5de14949f367c8ecbc64c4de3cf01f70d18302		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE445 11232 bytes
font_01_sfnt_off0000fe26.bin
f9ef14ad00a6d18a951b2dd0df7c96d4c4c9052bb035e04ada58f06b838c3689		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE26 16920 bytes
font_02_sfnt_off00012a0a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0A 16792 bytes

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