Malicious PDF — malware analysis report

Static analysis result for SHA-256 000f903847d566ea…

MALICIOUS

PDF

70.9 KB Created: 2020-12-06 10:06:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b9eacad0ff0e693c96456a1f3cd1ebe0 SHA-1: bb051194122e823c236c34ff571f6338e3a7f225 SHA-256: 000f903847d566ea7e3c780aafb5921b17d05e8fe36a1de4b469165223354cd6
154 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating it is likely a phishing or trojan delivery attempt. It contains a link to a known malicious redirector, https://gettraff.ru/strik?utm_term=hulu+error+code+p-dev320+reddit, which is presented as a search result for a common technical issue. The document body, though heavily obfuscated, contains text related to the URL's query parameters, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=hulu+error+code+p-dev320+reddit In PDF document text
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5fc61c2ed88f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491437/normal_5fc07b9fb1629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_5f8ce186bbef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387433/normal_5fb765a3236b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_5f9d387b1f3d6.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/9dbf297e-7676-4ddd-8370-d1bac2b4a780/depoxijimajoza.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe03ecfa04221c71e765ba/1606288366101/f2p_ironman_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd7c2b3-5d7b-4ec1-b607-596aaf7f3ef2/buzabinego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37f29d6-f6a1-47a1-86be-7bd1e764f1fe/33359838319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ef5598-c750-405a-b56e-bf6f83b0f00c/hat_dieu_rang_muoi_cashews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884bbe32-eeed-4614-a632-06f546cf08fa/kanger_subox_mini_starter_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e772de8f-757b-4702-bddc-8832a681a7f2/51183888492.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11858e5c7695ca99cc683/t/5fcc2754920f47545b844176/1607214933330/zogipotodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0af1171e-a228-424d-9871-ab90272327b2/zezaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a39f37-d84f-4457-a1d4-5844c4fcce18/rosujifovuzuket.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_off0000d6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F8 5172 bytes
SHA-256: b5998254757fe5c8633389d9c2fe983d1f50364cb4ae6fc08d81c17f21fc6580
font_01_sfnt_off0000e8b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B0 10704 bytes
SHA-256: cc5c4a6c90ac86a8fddc1b0d210412b02787bce0424b0a4d6983ac45179f9bdc

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