Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9279ce11ea5e63…

MALICIOUS

PDF

42.7 KB Created: 2020-10-07 06:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 72623d9e83dbc759dc02931d663e3a81 SHA-1: f32dbcec14fafe335ec9517a6f6b9d83cd3d47e5 SHA-256: 6e9279ce11ea5e6371dea148eb108e216378d9f3ad4bbc6038106d11f0e0f546
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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=russian+children%2527s+books+free In PDF document text
    • http://kirara.interwestunited.com/uploads/1/3/1/1/131163857/df0af436c6017c.pdfIn PDF document text
    • http://files.shelflifeart.com/uploads/1/3/0/8/130874115/gowuxifafulo.pdfIn PDF document text
    • http://files.fashionistastudiovictoria.com/uploads/1/3/0/9/130969704/3941964.pdfIn PDF document text
    • http://files.avsc.org.uk/uploads/1/3/1/4/131453394/kulodepebisa-sajobe-jozewud.pdfIn PDF document text
    • https://site-1041207.mozfiles.com/files/1041207/sazexakixifilerut.pdfIn PDF document text
    • https://site-1037122.mozfiles.com/files/1037122/mokirasofuzas.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/86183003395.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/2da50ee5-417d-491b-be1f-5d945c5ad688/zapozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22abe75-1ba9-4ed0-b318-f200fd29cb04/mewajanoxoduto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d7477f9-c28d-4090-b249-2f970f7abd5b/24663665344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112b072a-2e62-41aa-9505-13b36c7f1cf7/18237448928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ace6305-83ee-4599-b546-07fa04f22c4d/musekipazexirapifu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca5a00b0-8c1a-49c9-9a51-353fdc514371/gitusipukodogokuletal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20ffca24-fd1c-427b-b93d-40f311369948/64434684540.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_off000068e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E7 5352 bytes
SHA-256: 34cf94fbfd905c86bf1060c69767eb594fd19766928618387207c9ed1b8158f6
font_01_sfnt_off00007b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1D 10260 bytes
SHA-256: f3cfb6048a39e746430088319d6f4c51dc231f7324d10d462fc1e239dcc29c60

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