Malicious PDF — malware analysis report

Static analysis result for SHA-256 2319af544c938548…

MALICIOUS

PDF

75.1 KB Created: 2020-11-25 09:51:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 07020399b70ca3810a217a513d32cb6b SHA-1: 171e8bc68b2036ef468e4bc0c2e3f342eabd1e89 SHA-256: 2319af544c9385481abc08eb5fc567715de8d009c478c56f8c219a29120eee39
214 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying it as a redirector link pointing to 'https://gettraff.ru/strik?utm_term=super+mario+bros+game+genie+codes+snes'. Another heuristic flags it as a PDF link farm, indicating a large number of outbound links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded links are the primary indicators of malicious activity.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=super+mario+bros+game+genie+codes+snes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f875969ae347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f91a4075c45a.pdfIn PDF document text
    • https://xotogulil.weebly.com/uploads/1/3/4/6/134655180/pugodumexolawepuxavi.pdfIn PDF document text
    • https://vokugekezigak.weebly.com/uploads/1/3/4/5/134592112/bb757685926.pdfIn PDF document text
    • https://sibolapitabake.weebly.com/uploads/1/3/4/4/134469628/1811550.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/3d21f99.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zukukelejurotef/lugevazuwijunukobas.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/46071499957.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/zufuxafoferupoliwopiwob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a58190a-94ab-4ff1-8072-0c2da211ebe8/kokeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1f0574-167a-4ee4-b6d9-161cb755bfb5/pezuberatoxefir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26565308-be11-46ef-8010-c91130e505d5/96875263151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/435fb6f5-5dc4-4d1d-aea1-728e9fbedf15/mikinudovetibisupowudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa31d401-addd-44ae-814c-bf4a5a2a2445/pedicabs_central_park_nyc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a697a253-ed9d-474b-873d-69b7ac21b2c0/access_denied_you_don_t_have_permiss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d383554-6229-4b34-8978-784293a6d37f/reading_ielts_general.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_off0000e7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D8 5604 bytes
SHA-256: bc935008c084c298b2fb9b7eae30bfb40f6828af59e4824b3d2ac984e0faf5d6
font_01_sfnt_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 10968 bytes
SHA-256: 26bd6857efc254bebdc4318d47df07d962cb6012d3da776e83d2edc586b24245

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