Malicious PDF — malware analysis report

Static analysis result for SHA-256 293f59049f462861…

MALICIOUS

PDF

79.4 KB Created: 2021-07-21 10:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b7c2b0f00e626df5945e413e49ee855b SHA-1: 7c1c20bcf87a7e5a44d2992f0e1cd08274b64e2f SHA-256: 293f59049f462861d1e331dcc9b67c9569f2cee8d0462b2256eab4a0626d2093
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are confirmed benign, suggests a potential phishing or credential harvesting attempt. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8666

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/-MXWpcYQ7kA/square?utm_term=sunset+drive+in+theater
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0716940a5bc6c0f7592a9/1626370409682/text_classification_with_bert.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8f5c0b68d8f0f4bf63124/1625880001203/19012412166.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8295d7d3b385c94b89e6b/1625827677481/preposition_exercises_with_pictures.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f36298c4d0d61e67393285/1626563224282/zosesizutodoxador.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8420f8c62796cdc6add3d/1625833999315/synonyms_of_relevant.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f4dfa2c4d0d61e674a5d69/1626660771178/tokedekupuwune.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8e402b132fa36206ff68e/1625875458146/87914753725.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_off0000d679.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD679 16792 bytes
font_01_sfnt_off0000ee90.bin
17112860e32f69f9154b7dcb0b983bc640cb144545ec24e0fd66ac4742b5497b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 10420 bytes
font_02_sfnt_off0001061e.bin
56084986c2e514225da83e93aa17e7db899bb9479f7357e40b6bca907c49ab7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1061E 16696 bytes

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