Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd140a165c770f39…

MALICIOUS

PDF

217.5 KB Created: 2021-03-24 18:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9238bf10bcac200b967b6a2d671c6812 SHA-1: 8250c457e8c2ebd9150e50b5122bfe80be74aa12 SHA-256: fd140a165c770f394c40c403a4bf7399b9a5eee9d129d8b1800484356e31556c
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, and it contains an embedded URL pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to a 'Tricaster mini manual PDF', which is a common tactic for phishing or malware delivery. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://xezojetit.ru/wix?keyword=tricaster+mini+manual+pdf
    • https://robivitoj.weebly.com/uploads/1/3/4/3/134334713/vexomudex_jaduparokukugi_woketudagor.pdf
    • https://jekudadej.weebly.com/uploads/1/3/5/3/135301654/9439748.pdf
    • https://cdn-cms.f-static.net/uploads/4470535/normal_5fd1ccf4dfab4.pdf
    • https://cdn-cms.f-static.net/uploads/4377407/normal_60596cded2319.pdf
    • https://lugilalosu.weebly.com/uploads/1/3/4/3/134314137/rujewolewip.pdf
    • http://talemine.getenjoyment.net/optiplex_755_usff_specs.pdf
    • https://static.s123-cdn-static.com/uploads/4453142/normal_5ffe4ad071002.pdf
    • http://dofujifeluradep.medianewsonline.com/vepogawomesixakazupowogu.pdf
    • http://vomoliba.scienceontheweb.net/advantages_and_disadvantages_of_business_process_outsourcing.pdf
    • https://foxujutuz.weebly.com/uploads/1/3/4/3/134348357/puxaxepezukiv.pdf
    • https://41fe7446-7195-45c8-
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_fead25484aa5402ea253545991ca018e.pdf?index=true
    • https://e0eedba4-cf99-4c42-97f5-d3f9ae5832dd.filesusr.com/ugd/e36ea7_2d4aed600c274ce09fb038270184e810.pdf?index=true
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_d4fc85a29e8e4efea9b6eed7e8faa045.pdf?index=true
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_9626f5602f6a42bf966b37684f321b63.pdf?index=true
    • https://c93ae04b-3d95-4128-ac62-0503c91a26e1.filesusr.com/ugd/002f5e_616dbe8ba7f547ec92909412cc73d2fa.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5571bf1b-6772-4225-8ebe-69db06701957/90149845235.pdf
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_c1314c68ec0148fb97e9a62359e8930c.pdf?index=true
    • https://4fe85328-8dbf-40e9-afa8-2c8d6ff8a9c8.filesusr.com/ugd/9c0842_4bc3749b38924513acb9b5948f4fde75.pdf?index=true
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_b2ec91d3ae9942d4b9c910867143ed0c.pdf?index=true
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_7a9e3ea1eab248628d90a5915d76c6df.pdf?index=true
    • https://b3e719cc-30df-460f-a5cd-d2fa480fcfac.filesusr.com/ugd/b2b6a5_ac089e7c42b6466d88727588eb792296.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2d3ecb6a-ced9-4390-b65d-186ca83b8dd2/92444053834.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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00030faf.bin
eaacecfad56f9cc47c5bc3f836c014408ecc9493c8dd704023e964bd575bdf63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30FAF 2340 bytes
font_01_sfnt_off00031a0a.bin
7ce48321372b3d2483def5cb1c6a277ca6718841cf8192398fdeef5b1b96e17f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31A0A 5248 bytes
font_02_sfnt_off00032bcd.bin
80b7c95b7c96d769970470e6c8faf08cb19c84e49bcaf1ed6e0b3f184ae76388		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32BCD 13252 bytes

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