Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d45a2e717ebbde3…

MALICIOUS

PDF

78.3 KB Created: 2021-07-15 22:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5b200667f1b674818fcc3c5d54e1174f SHA-1: 47fd7d00c7d7011636b5c212c375ab8ec0c6a04a SHA-256: 3d45a2e717ebbde391d396ac3bd9e238ba00c04425420393f8c80064af77e6e7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains embedded URLs, and ClamAV detected it as a phishing trojan. The ML classifier also flagged it as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the detection results suggest it is designed to lead the user to malicious content, likely for phishing or to download further payloads. The PDF_URI heuristic indicates an external URI was found within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7341

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/iXsW93xxTQA/square?utm_term=meaning+of+spellbind
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee56caf72ce0266e118a55/1626232522272/28749590294.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9657b37cb90447561f6b6/1625908603901/the_last_lecture_download.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f051a123ee5e09cfa90a68/1626362273912/toxitamowuwifez.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_off0000ce28.bin
9dff7c68d9f4bb79bd3f9eb060def6ee854d6575297cd2844e99532552860378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE28 18104 bytes
font_01_sfnt_off0000fdcd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCD 16792 bytes
font_02_sfnt_off000115e4.bin
c0b4f684fe3ea5ba189ed69ef4f09f16255e332e9113c449da642ee0ea4c5469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115E4 10608 bytes

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