Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2c1b9d1338c04b…

MALICIOUS

PDF

74.1 KB Created: 2021-07-21 13:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dc93f2d669b1dec9269450bc513b4f35 SHA-1: 5b56b289daef86bf720b95529ccd26f2b9fd124f SHA-256: fb2c1b9d1338c04b577dbcc30987ed261dcecf18c7933340a3ccafd8b11548ae
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. An external URI was found embedded within the document, likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of embedded URLs and the high risk score suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7882

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/razvivatel/yapz/~3/UQ8tT55rDuk/square?utm_term=figurative+language+used+in+the+road+not+taken
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f6700e4920142c5d9cd5dd/1626763278604/the_meaning_of_fiddle.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f4e6ffc0fa6a1644f140ce/1626662655284/24006336495.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e78f2697884458c99d2592/1625788198491/blue_heeler_chihuahua_mix_puppies_for_sale.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f5b840853004186d340989/1626716224498/savuji.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_off0000c282.bin
a147180f484dabca18fa6864bb71791ebfb6226bdbe7e8244584ad01c80c7883		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC282 16384 bytes
font_01_sfnt_off0000ece9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE9 16792 bytes
font_02_sfnt_off00010500.bin
0e805a46673869f0cdde505d79105ce48b3355bb4714146492467fa7da3dce3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10500 10764 bytes

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