Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ad544782b7ea6d…

MALICIOUS

PDF

78.7 KB Created: 2021-07-20 01:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cc828a7823976f38f6505568547425e SHA-1: b9797ec0116885886ecb8f3a8329e7598ce732c6 SHA-256: 30ad544782b7ea6de45663aba099cdf7d332afea70206ef30f4595e88b166d3a
104 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan, and a machine learning classifier also flagged it as malicious with high confidence. The presence of an embedded URI and a heuristic indicating a visual download button suggests a phishing lure designed to trick the user into downloading a payload. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/~3/5JeRQhMeIYg/square?utm_term=studying+engineering+4th+edition+pdf+download
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f01035d777570416546478/1626345525362/22969986265.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a8254aaab0286a880297/1625794598070/how_much_money_does_a_good_lawyer_make.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0b0e6c825a553dfed766b/1626386662415/command_and_conquer_red_alert_2_free_download.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee212284a0477e84a96f88/1626218786402/how_to_describe_the_tone_of_a_poem.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec794b7e2b6271615a5f04/1626110283613/get_marker_out_of_fabric.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f23b3e9c7c9f0ea98f3f93/1626487614505/exp_share_fire_red.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2a6c49c7c9f0ea992de27/1626515140931/mefujulozivuw.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f547cf29712869f07e786a/1626687439579/nmap_find_all_hosts_on_network.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8aa040274373759742e4/1626114720226/mipobumazukato.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec82b37726b430b4682390/1626112691337/70331093917.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee871a3753dc428c8c2e4b/1626244890838/18500456740.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f5813523bf9c1bca00e473/1626702133736/55302304806.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_off0000d06c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD06C 16792 bytes
font_01_sfnt_off0000e883.bin
6bf62e2177b82703aaf08a19f56a8714924349fa6e3371d46255af0a1ed10b62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE883 11064 bytes
font_02_sfnt_off00010222.bin
e2ae97ccb4e8086835901b871676c3318151fc4b964331260531b9ee42d23af6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 16952 bytes

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