Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0e17e8156323f4…

MALICIOUS

PDF

80.9 KB Created: 2021-05-04 08:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3f4c2ad5df9678510a50b03c85f61dd4 SHA-1: 7b233613baba6ed84155da23de6db5c4212ee6c2 SHA-256: 7c0e17e8156323f476761b09f02b6f391935f5270dcfa60ec0166a2d32fbb782
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, 'midufefew.ru', which is likely used to host a phishing page or distribute malware. The document body, though heavily obfuscated, appears to contain keywords related to product information, suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=casio+5146+ga-110rg+battery PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462066/normal_5fee66cab2634.pdfIn PDF document text
    • http://kawlites.online/345912872905dzty.pdfIn PDF document text
    • http://alcexpress3.xyz/zovuxosou9kxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486344/normal_605add9940882.pdfIn PDF document text
    • http://getyourscore.info/windows_media_player_classic_freee54su.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_6058e1b35f8f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_60217f5e8e325.pdfIn PDF document text
    • http://vinnipoh.fun/meade_lx200_emc_10_inchs1i74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529149/normal_60253bb8ca002.pdfIn PDF document text
    • http://hotita.fun/avanset_vce_crackazvhh.pdfIn PDF document text
    • http://copyrighthelpcentral.com/cpm_algebra_2_answersx57w5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_e00c7ccea25247c8ad255c489ea86fdb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f7d67a-8cf8-4f2e-8cad-384baadcc7b7/95383642086.pdfIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_94def05785b24527b4a9f54b503992d1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dae0e2a-b738-4f6a-bf24-c4a6ae8ddace/world_war_z_crossplay.pdfIn PDF document text
    • https://2f2ab42d-e0b4-4bd3-aa50-2430da1ff5fc.filesusr.com/ugd/eaf48f_43ccbf6efbc54bc5834d9c5a470be0ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e25eb50-178f-47b9-a9ac-0aa5e13fd0c4/71839288360.pdfIn PDF document text
    • https://c039f79f-855f-4b64-8838-30138aeea086.filesusr.com/ugd/6b78cb_a1757b89cc27442c9b2e0d1f83722479.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa9e9b7-ab0d-4d45-9e60-da6793339977/16576156755.pdfIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_f80573593137472fb3e17b7987b62d67.pdf?index=trueIn PDF document text
    • https://52c77544-2eb8-427c-ad0e-a8a7e2ea9366.filesusr.com/ugd/93288f_ffaf163025cb4e62b517ae9dd447ba0c.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B4 5560 bytes
SHA-256: 6b33800b894e010ac8bff284877f3a393f93d00aba90be68ffd161cfda7aae68
font_01_sfnt_off000105c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C6 15120 bytes
SHA-256: 5a31ec6b591dfbc3c094a4dec8e4c48a94327b64167fd4cc0e92a7ba7263d75c

Open this report in the interactive analyzer, or submit your own file for analysis.