Malicious PDF — malware analysis report

Static analysis result for SHA-256 016d2c68399cbe67…

MALICIOUS

PDF

67.8 KB Created: 2020-12-07 06:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9e9a2deeba691330c57a7bc46a5741a9 SHA-1: 9da6fc11a2ba42ea167070581eec5b0f294332a7 SHA-256: 016d2c68399cbe67d16524b96aa75ca99903d94c842883346b4c4be93fc26deb
214 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to redirector infrastructure and potentially malicious content. The heuristic firings indicate it is a redirector and part of a link farm, designed to lead users to harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a malicious payload or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://ggtraff.ru/aws?utm_term=harewood+primary+school+leeds+ofsted+report In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_5fb9d4d4c26e8.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/gedozumugozewutelak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381751/normal_5fc558ed34747.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/zoresidumobibuvoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459777/normal_5fa87eb5e690b.pdfIn PDF document text
    • https://garijonomiwobe.weebly.com/uploads/1/3/4/7/134711127/29effb74040f8.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/af2ce340-c18d-4e79-a9e9-9fe1dea63539/tuvibef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4683367-bf5b-485f-812e-302a25af81af/vazilegekafizubugologi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1348473d-01ad-4602-8e35-053ce7df7c44/82966557437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91655f26-4576-4683-aadc-b9cbb78eeb90/mipobunalekepase.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_off0000c9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AA 5552 bytes
SHA-256: d834741020e3e6d38d141f93daa3f46c1166b30bf579ceb73ad5ea6f19e52478
font_01_sfnt_off0000dc7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7F 12220 bytes
SHA-256: 8e2d9f274eaec17e025da990b273a2d2a0752917db31107d7565ddaac4c04b35

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