Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9eaccff920df605…

MALICIOUS

PDF

108.2 KB Created: 2021-07-16 06:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f362c382c5f72dc17e84adba7d3c431e SHA-1: 982f4d7eefcb903c7933a82ccc4cf4d77ad07922 SHA-256: c9eaccff920df605ae46d42ed259058b839f58d77ddfb3da3a1350e624638dc1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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/razvivatel/yapz/~3/pL_UGxDroB4/square?utm_term=what+is+pragmatism+according+to+william+james
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8999fc1e0ce526f75932a/1625856415492/figimanofuxivetafam.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9622b025aa46e30d4c70d/1625907755328/bizarasu.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e87502c2683467d4f27760/1625847042919/nipiz.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec79920d838b6c850bcd2e/1626110355102/busetizenevusetawoxobu.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee26fdfc191471fc6ae6db/1626220286103/how_to_charge_battery_subnautica.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecaa447dc7460dd09eb895/1626122820308/29493175990.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0b1ea5554232196b567ef/1626386922341/ctet_question_paper_with_answer_key_2015.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed9404f827c554fd9ef17d/1626182661075/15337005467.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8efbc426b81e8300d57e/1626115835470/bulapozuli.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0d5cfe7c7822395843162/1626396111342/not_yet_meaning_malayalam.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee5322df274736e0ad11ef/1626231586821/the_crucible_act_2_quotes.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_off00014762.bin
f7eecc60713d0fe6a6ce22c8d873b9ebe8cdcc37e9682666ebcd2e1702a9b5e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14762 11172 bytes
font_01_sfnt_off00016129.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16129 16792 bytes
font_02_sfnt_off0001793b.bin
ea105fe20e984fa83b6e4e5d1f2b900db52f31b9ca5409f7d49785372e97846a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1793B 16696 bytes

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