Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f774bcebff0538…

MALICIOUS

PDF

67.4 KB Created: 2020-12-18 23:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: faf4a205322902c8b8020092ca1d00d7 SHA-1: d56901d6a5253791b0397187c7606ff5072b83e8 SHA-256: d6f774bcebff05380322183b5b81037d0b91f5a0f18dacf19da5825caf4a9fff
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing sites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or scam campaign designed to redirect users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=the+hobbit+quotes+journey PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466391/normal_5fad3e18c82b0.pdfIn PDF document text
    • https://nagigezivozitos.weebly.com/uploads/1/3/4/3/134340852/nopowatixeseziwuju.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/e2f51a95b61dd.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/xapijifas/billboard_100_april_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e034a6-1a8c-43c1-9169-f4c4dc685d0c/83954255110.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/78113076386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/635d34c8-59e2-4f90-9fc6-03f5456ee90a/mekisuzetetixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfe04a39-343e-4874-bb7e-95f13b5748a2/jisidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db5d129-4999-4cd0-9c37-1d71ec443144/binomial_distribution_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8510f2-9f11-4303-ac2f-9879ce136f74/53600931412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c8026d-3b79-43fd-922b-993f9b4bad52/xogodusagemokikubevomos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c026d5-6521-4e9b-99df-23f6cecde1f0/18717192851.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/beethoven_pathetique_2nd_movement_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ea64df-b0ba-4cc8-8428-f2fc260b313d/milisif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f47ecfa-36ff-462d-8011-c02486ccb7e4/23548779034.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_off0000cdd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD8 4924 bytes
SHA-256: f3486fe7aee6d47226d488ade4ff1b480bb6f48cfe622ee9666e6614ce785ba2
font_01_sfnt_off0000dea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA3 10048 bytes
SHA-256: d197ec8c176bd0214fdb828b6fd07518fad01a627e63d0d829704cfb4422abc5

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