Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ddf56aadc24db4…

MALICIOUS

PDF

79.6 KB Created: 2021-04-01 02:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2f006f5bf757f843d7e462512a6d1b48 SHA-1: e5c91b1e1452a01e18359b5ad6a565dcef844a84 SHA-256: 84ddf56aadc24db48fb509453cfdb763cc0e237d3c15cba342d5433005520dcd
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection (Pdf.Phishing.Trojan-d2568dad23a94d95) and an ML classifier indicating maliciousness. The presence of a "download button" lure and numerous external links, including one to `midufefew.ru`, strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to movie downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=the+return+of+the+king+1980+full+movie+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466151/normal_5fed1452c1ebb.pdfIn PDF document text
    • https://cdn.sqhk.co/nalujujoso/hcxrjhi/lufipuxezejusanifakega.pdfIn PDF document text
    • https://vutepunuvo.weebly.com/uploads/1/3/1/6/131637517/2560148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383451/normal_5fe1ab53db748.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/Wbhihbq/download_3d_snake_io_mod_apk.pdfIn PDF document text
    • https://sajixigepanosu.weebly.com/uploads/1/3/1/0/131070231/6605172.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446152/normal_5fef6a780c48b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452599/normal_600167ebc4050.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/texas_instruments_nspire_cx_cas_graphing_calculator_emulator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427526/normal_60111ca480d6a.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/body_language_tips.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420752/normal_5fee3c1bf41fc.pdfIn PDF document text
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/gidujivixenukeka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_604987653282f.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/9fe0b.pdfIn PDF document text
    • https://womevelem.weebly.com/uploads/1/3/2/8/132814223/2b66343fe0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b5d0526-1da4-4924-a57d-402df5e34b3f/best_flysky_receiver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae34384a-bbbb-4fa4-bc99-b27410daa1ea/tefuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ed3f7b-d7e1-43d8-8d55-91e750a288cf/83425164277.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc9e5e8c-9956-48d1-81fc-a2326bf3a7bc/87738313703.pdfIn 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_off0000f869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF869 5852 bytes
SHA-256: b3babe811cb50c01828e843d08a9ae4670d7a67e8e21da40fb60c1d4b3ba22ad
font_01_sfnt_off00010c44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C44 10612 bytes
SHA-256: 3205d862447718a2759421529a463de3cc6917dde652f670dec4ef889a694c62

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