Malicious PDF — malware analysis report

Static analysis result for SHA-256 bff28db8b8a75e97…

MALICIOUS

PDF

78.7 KB Created: 2021-03-17 14:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28d823396465fcc7de01f476f41a69a6 SHA-1: 24fa3fb7b1092088a63569fef483fe9aaf6d7373 SHA-256: bff28db8b8a75e97a6c582c90bf9a8bc87b73fef9d1eb6000f121cdd3b34f7f8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=how+does+currency+exchange+rates+work
    • https://cdn-cms.f-static.net/uploads/4415046/normal_6019d6f27838b.pdf
    • https://cdn-cms.f-static.net/uploads/4382972/normal_60431f152146f.pdf
    • https://static.s123-cdn-static.com/uploads/4367294/normal_5ff6aa0cc6a64.pdf
    • http://resipowepo.getenjoyment.net/mesulumeva.pdf
    • http://fitness1.space/1331800086qnssk.pdf
    • http://jexekiraj.sportsontheweb.net/73673004136.pdf
    • http://6gusevshop.website/what_is_a_voided_check_wells_fargon3ybw.pdf
    • https://cdn-cms.f-static.net/uploads/4420927/normal_6031b19842060.pdf
    • https://static.s123-cdn-static.com/uploads/4388833/normal_5fd07762c58d8.pdf
    • http://niwopofe.scienceontheweb.net/konstruksione_arkitektonike.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e791dc30-71fd-4519-a75e-453748eb9c32.filesusr.com/ugd/8a5fcf_587504ac990a4fb1a477f8b6221006be.pdf?index=true
    • http://nibemodida.myartsonline.com/world_inventions_and_discoveries_list.pdf
    • http://nononulavojiki.myartsonline.com/lijofofu.pdf
    • http://tiwosutodegadax.onlinewebshop.net/2056959911.pdf
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_6dfa6ab5df6240a28c8ae658a3bd60cd.pdf?index=true
    • http://lukafimagog.atwebpages.com/kiwofu.pdf
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_4aa55dde3f504f04a8e9be59020cb816.pdf?index=true
    • http://sidepojedava.myartsonline.com/pride_and_prejudice_volume_3_chapter_9_summary.pdf
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_4353a5dfd5c04104a3a10f95dba0424d.pdf?index=true
    • https://s3.amazonaws.com/wejuvono/90538152937.pdf
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_bea9dea37dd64a73bf84f5fcb3b1cadc.pdf?index=true
    • https://s3.amazonaws.com/gofiguj/26512043692.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4ff.bin
f88ab9feb7ed70473a4046dc8aeb8fc967b5643112f2798d6a29e28051649dc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FF 5456 bytes
font_01_sfnt_off000107a0.bin
d8a1678a95da8098acd7e57f2e5baff27d55b9aba393cb010dbb374f21a2de1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A0 11032 bytes

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