Malicious PDF — malware analysis report

Static analysis result for SHA-256 613a3c25aab21d65…

MALICIOUS

PDF

76.8 KB Created: 2021-07-16 14:20:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cdee2f98c7a920e37b5d2e3207033457 SHA-1: a9e8de8fd963985d71c840b5770103a2d85c345c SHA-256: 613a3c25aab21d654fe5a146cefc311d0b5c306ce715785650b66c7e7bcc1c1d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or malware distribution attempt. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect the user to malicious content. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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/cEZ-xJcQpFE/square?utm_term=ultimate+frisbee+unit+plan
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eddc344485e42169019651/1626201141044/wow_best_fire_mage_talents.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e797a045e16b3be7e5a623/1625790368640/tazamojuv.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecaac6c426b81e83039e6a/1626122950887/climographs_of_the_world.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f039e5365a201d3c3c79c4/1626356197779/fifa_mobile_free_download_apk.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f05153499c44206eaead19/1626362195901/23873481730.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_off0000cc1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1A 16792 bytes
font_01_sfnt_off0000e42c.bin
7ceb7d6ea1db74f0ce8f8ebc8a8946f01102e969c7f16c05bc087beb2d93dca5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE42C 16576 bytes
font_02_sfnt_off00010f76.bin
3a2176604cf71e0edf670aeda76f82bbae0e1a911cc967a738d56cd5ef2216f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 10648 bytes

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