Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9ec04215b55e4b…

MALICIOUS

PDF

40.8 KB Created: 2020-11-05 06:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0416106ffee39acb7c20029377139273 SHA-1: 1d185b7b7354c1584c5c49ad96c2b7de595ef7c2 SHA-256: 1b9ec04215b55e4b0d0cbe9891a261045e108aaaae2ac6f52915393af301e87b
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?keyword=osrs+the+corsair+curse+guide'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL, indicating its likely purpose is to lure the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ggtraff.ru/strik?keyword=osrs+the+corsair+curse+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412593/normal_5f9be0a20233d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388413/normal_5f973720a9c5c.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/bexisigusaxeg-sipebazes-sozilonobufe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f872b89dd72a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373769/normal_5f9136533235b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_5f9eb333d1bbe.pdfIn PDF document text
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/3426c1.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/dedinavesute/effective_mass_calculation_using_vasp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ded676b6-fb25-45d0-bdbb-9ccb1dbfd597/pekupib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9dcb464-6e96-4ad7-8620-7b8e6f53a841/reinforced_concrete_column_interaction_diagram_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/history_book_in_hindi_for_ias.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/8821554853.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_off00006125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 5196 bytes
SHA-256: 9c06ff961fb9ae97ff89cbcbd059b7f8399c4050559dc936a73db0310b96a3e0
font_01_sfnt_off000072c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C5 10492 bytes
SHA-256: 5b4df360be790659c6e0175df800865d48911394d96855327f30e81329403f23