Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1a31e49afe382ca…

MALICIOUS

PDF

46.0 KB Created: 2020-11-06 03:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 95a519624f1a4296a607f3dc54e120d2 SHA-1: 81010e46fbe285743bfdcd93fe040b6f76b0bc39 SHA-256: b1a31e49afe382cad2a9fa72ef4ba87f8879002fb17c11999bab1684588651bc
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, suggesting a link farm or distribution mechanism. The document body text and embedded links reference 'eyes of glouphrie osrs', a tactic to attract users interested in the game, likely for SEO spam or to trick them into clicking malicious URLs. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URIs supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://trafftec.ru/aws?keyword=eyes+of+glouphrie+osrs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403421/normal_5f97c8ea7cc02.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/sivubasipij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_5f9d17f531322.pdfIn PDF document text
    • https://rosofofupamufi.weebly.com/uploads/1/3/4/3/134364257/zobomifepi.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/nixobisad-denurasuke-sadomos-jixovireziwevak.pdfIn PDF document text
    • https://donedujawag.weebly.com/uploads/1/3/4/3/134315137/bobet.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/1794f5a8debb.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/9e4d4d6c-21f2-4763-92f8-0aecc0e58306/gazupefopeduvola.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/777ce036-5ee4-46b7-8773-b25a99db9c69/68100683995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323253c6-3697-40b0-acfd-6783947db0cb/pimiferekodusir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e08195-aa79-4bda-81bb-3c7c3ff71f57/pawn_of_prophecy_characters.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_off00007513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7513 5012 bytes
SHA-256: 03075be8ba1cd45a0f960de99b9e6a012bf893f1d8fc9b1af56627cdef02da33
font_01_sfnt_off00008633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8633 10996 bytes
SHA-256: 6544ccb7dc06af6d0e0768a34013905159dcf8b9199f8ba17baf2cfb6d8cbf29