Malicious PDF — malware analysis report

Static analysis result for SHA-256 04da6c92eb9b4680…

MALICIOUS

PDF

41.4 KB Created: 2020-10-03 03:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 54ff78eae0bfe6d29fd1c3cbf41d4f88 SHA-1: b806c3a2cc3e2d0e49d59a347da5af827e9748c6 SHA-256: 04da6c92eb9b46806b284064bc21455c417c087c004da8739099e02e6deba286
124 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for movie content, likely to entice clicks. The ML classifier also strongly indicated maliciousness. The primary IOC is the redirector URL which is likely used to serve further malicious content or phishing pages.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=apocalypto+1+t%2525C3%2525BCrk%2525C3%2525A7e+dublaj+izle In PDF document text
    • https://site-1037227.mozfiles.com/files/1037227/vodemudarodoralujizu.pdfIn PDF document text
    • https://site-1037059.mozfiles.com/files/1037059/fejukezarekoniguvagij.pdfIn PDF document text
    • https://site-1039583.mozfiles.com/files/1039583/75441114511.pdfIn PDF document text
    • https://site-1037106.mozfiles.com/files/1037106/33650410149.pdfIn PDF document text
    • https://site-1037907.mozfiles.com/files/1037907/lowumuzuretigaxufax.pdfIn PDF document text
    • http://files.barryjayjewelers.com/uploads/1/3/0/8/130814492/be91b.pdfIn PDF document text
    • http://files.cajohnsonconstructioninc.com/uploads/1/3/1/1/131164157/milunolaxuxowafopewi.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://uploads.strikinglycdn.com/files/29a5c9ca-62d5-49b9-a482-2491fc783103/22041396751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2419e699-6066-466e-a3c4-684cc3d2fa30/fanuburapinarisitojun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a012cc0-f737-4dab-81d1-51ac36604ca9/69679713057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d0b0049-2bcd-4e58-b55d-db8fe687d63d/4304966872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f95989e-859e-429e-8de9-fd7958bac713/zulapinigetulizenuvodago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/153eff8f-be91-4289-9eaf-ad91d08572d6/64049309412.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dacf781-9618-44b9-a127-28f982b44cc5/fegususemene.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_off000054c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54C1 5440 bytes
SHA-256: b4afc2a2f9e5e281520d0812c12d7967b469cf3082ee2e17efe58670a4767d4b
font_01_sfnt_off000066ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EC 9948 bytes
SHA-256: 58492816983acda1997d69ed6a79f54f8405a15e26dfad390e3fecae8e666fc2
font_02_sfnt_off000088f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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