Malicious PDF — malware analysis report

Static analysis result for SHA-256 c503a99fece26aff…

MALICIOUS

PDF

104.6 KB Created: 2021-07-18 19:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f673d6831f2519fb00b3558ef8860001 SHA-1: 210a6d839b5b17e80422d1fd079b36658878de8e SHA-256: c503a99fece26aff1b9bd5d084a2faec068e5691141c27bd331fa5f484d2c8cd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs, one of which is flagged as potentially malicious by ClamAV. The ML classifier also indicated a high probability of maliciousness. While no scripts were extracted, the presence of embedded URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5511

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/um1bUVUAM38/square?utm_term=martin+scorsese+young+taxi+driver
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f1822e7ffd90482e3b87b2/1626440239161/roluvus.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f07d559383a8111692c959/1626373461493/12145389531.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f2bda950974615f91b22c4/1626521001833/34279715032.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f01fbc49582827e2ff1807/1626349500205/13261613066.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f3fb616c177f33d7a8e514/1626602337900/51397082998.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8e4fb0cbdad4d35030807/1625875707241/42855063209.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ac2.bin
b565d1ce9c41c9944a1078644ed46f853470bf64c219cc9c456b4105072608c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AC2 19088 bytes
font_01_sfnt_off00015b18.bin
2b5020a02d9e3fb410fdd04d65e0bbea414fa05ae86816c1d80ab956ffd5490e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B18 10876 bytes
font_02_sfnt_off00017437.bin
27705010016409574b23e711f396aad3e09bb055fdbc54903c4f33c24aabf0d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17437 2204 bytes
font_03_sfnt_off00017dea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17DEA 16792 bytes

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