Malicious PDF — malware analysis report

Static analysis result for SHA-256 49884ca4eb06d12a…

MALICIOUS

PDF

64.4 KB Created: 2020-12-11 18:02:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: eeb508c93ed5a6f904806118ead23ed7 SHA-1: d67da6a94e85e2d5ac56bccd535414d0aaa87060 SHA-256: 49884ca4eb06d12a327835271a0e48070185d328fa6ca279bcb801c59eaeeef6
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a phishing or link-farming scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, with ClamAV identifying it as Pdf.Phishing.Trojan. The embedded URL 'https://trafffi.ru/strik?utm_term=update+gopro+hero3+wifi+password' likely leads to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://trafffi.ru/strik?utm_term=update+gopro+hero3+wifi+password PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5f9249e09b4d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409243/normal_5fc90a845077e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_5fd26b7a935ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484641/normal_5fad4a6ac65a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420459/normal_5fcafd1763fc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478134/normal_5fa6b3e8abd7e.pdfIn PDF document text
    • https://xosetumigex.weebly.com/uploads/1/3/4/3/134371377/nejidus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476952/normal_5fb4700825564.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc135ac239b072291334e3c/t/5fc64ff8e6d49a06bb69e743/1606832122854/ninja_fishing_all_fish_list.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc310f192c50b1a1e85a8f0/t/5fc590e7f3de5e49b5243cf3/1606783207830/fiteligejifoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af8120c0-08d9-4cd0-9683-e42382d6066f/fuvenupukenakovukatase.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd1e7ce02d7d67505d5b43/1606229628674/dota_2_solo_mmr_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/764fb0dd-99ad-4222-bef2-725016c16994/78276175871.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_off0000be6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6C 5520 bytes
SHA-256: 65ca4568cfbf3713554092e681cac89a6402adc33d48419637a494036566178f
font_01_sfnt_off0000d146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD146 10388 bytes
SHA-256: 4225ca63702cdd987de30d47e9e788c863346531fb7b3642ad29a284dd79df2f

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