Malicious PDF — malware analysis report

Static analysis result for SHA-256 317278a29119fa57…

MALICIOUS

PDF

78.0 KB Created: 2021-07-14 01:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b27fcc27263d7e78d2b1882b5a0f99a SHA-1: df2fd0c9d27c63727c90fe15eb633c403984a1e7 SHA-256: 317278a29119fa578b253671cc52964de06894b11105bbb1e82c44515632f0b1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with a heuristic indicating an external URI. Although the specific URL extracted was flagged as benign, the presence of an embedded URI and the overall classification suggest a phishing or malware delivery attempt. No scripts were extracted, limiting the analysis of the specific execution flow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8827

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/sq/ugae/~3/cEZ-xJcQpFE/square?utm_term=dicotyledons+characterized+by
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9359c37cb90447560a03c/1625896348893/33983577589.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edd7013be50f2c5dacc6d2/1626199809368/37712840252.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8021a3e9df788e6d105e/1626112033969/jujalipodipujomexopu.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7f4ae45e16b3be7eaddd4/1625814190430/wotalorasogusiwudexojis.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9066d8ce0e10532d1b671/1625884269390/93101980826.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7edbc268f363b0864969/1626111707537/pexubupe.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_off0000cbde.bin
d6c7cf20f2c191e563d490892eb450cc172e5b81049a67cc5294be05c80aec42		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDE 17648 bytes
font_01_sfnt_off0000f990.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF990 16792 bytes
font_02_sfnt_off000111a7.bin
a522422afd80e24acf5e630884778998378f0673bb597288771693d90514b0fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111A7 10784 bytes

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