Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a4f767937ba5cb…

MALICIOUS

PDF

43.8 KB Created: 2020-10-29 23:39:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 21cded6be6d577931eb5ba8eb0e2d24a SHA-1: 1d74ec500099baeb5bf998d55b7addaebd82701c SHA-256: c2a4f767937ba5cbcbee006b4c7c6076111eb3c1370b851fde4ad17177ea299d
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically disguised as a search result for 'old roblox website link'. The ML classifier strongly indicated maliciousness, and the presence of numerous embedded URLs, including a critical redirector link, supports this assessment. No scripts were extracted, but the document's structure and embedded links are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/aws?keyword=old+roblox+website+link In PDF document text
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/9039088.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/lejalapisetuv-nuwofur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kibavutibeved/weekly_calendar_with_time_slots.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/55269362359.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/vmware_windows_10_unmountable_boot_volume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15b8f1fa-3298-4930-809c-d83e490f9cfa/90314855551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2379fe9-4b22-41cb-bf43-2d42f5cd76de/zaxigexawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae9dfa0-f326-448e-b523-1b5f606086f3/80285066831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54600148-62f1-42bb-885f-4f02cbdbd5fd/duxofe.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/bastards_of_istanbul.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/24438358686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8429b587-67c8-4f18-8475-8aca16d683eb/lagipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9846/4152/files/jufixojewunatilajuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F57 4788 bytes
SHA-256: 4dab4c27e56e98e988300bc0efe8e3f6a1e33917d91131735721028375ed7c87
font_01_sfnt_off00006fc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC0 10876 bytes
SHA-256: 029e3b00a9f53d1c0cf2305e3961f760744108131b447ca1ba4b5704d95d29e0
font_02_sfnt_off0000947f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x947F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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