Malicious PDF — malware analysis report

Static analysis result for SHA-256 affe7d0c9c883793…

MALICIOUS

PDF

259.2 KB Created: 2021-07-16 05:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 51ad15a6894bf993674b8489fe89b3f1 SHA-1: 403f4190365cd295449e5f5de48436059ff14555 SHA-256: affe7d0c9c8837936b61439627f941bf6579554b7f950c6504ee9549bbe1b467
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. A critical heuristic detected an external URI pointing to 'https://drafthe.ru/square?utm_term=all+is+well+meaning+in+tamil', which is highly suspicious and likely leads to a phishing or scam page. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.2068

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://drafthe.ru/square?utm_term=all+is+well+meaning+in+tamil
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee1d1b1cf0e6777f2c0856/1626217756099/wayne_tomasi_electronic_communication_systems_5th_edition.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f019d65d627c4551e3873e/1626347990349/how_to_draw_a_prince_for_kids.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f00a955d627c4551e2d327/1626344086027/29573748216.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed8c1667dd777ebfc3004c/1626180630428/emulate_switch_games_on_pc.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee4df65f7927514e3e4f1c/1626230263072/wapipexemipipun.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7b3c54d2175279d11635a/1625797573633/48421156837.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eda762c8cbd011b90cc99f/1626187618233/solving_a_word_problem_with_three_unknowns_using_a_linear_equation_calculator.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00036c1a.bin
32bf947853ea1033264a35487f1dadf7a87cc4ceec27810617a8d09bce952c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36C1A 10296 bytes
font_01_sfnt_off0003835b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3835B 16792 bytes
font_02_sfnt_off00039b68.bin
478d64aad58a46c60a63c2bd6d05d9c39068b35528f549688063ac651822ff24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x39B68 1760 bytes
font_03_sfnt_off0003a3bf.bin
a23e38e4f11aab92edb45a269e799d8b8dc13ed6b058c177016124d942afb164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3A3BF 25672 bytes
font_04_sfnt_off0003e429.bin
a243089ab19e6ba5c521e0490639452ab5cf31af87a0a962ec61e13e93897d53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E429 17708 bytes

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