Malicious PDF — malware analysis report

Static analysis result for SHA-256 99441ed737841e9f…

MALICIOUS

PDF

43.4 KB Created: 2020-11-07 08:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 6b645e6f32dfbb411444baa8269a8ff4 SHA-1: 35c5c378e89e4c7235a1a9660774369b719046da SHA-256: 99441ed737841e9f9cc3e7ef89d3a53fbfe463cb8d4f593a24bf6c05619c9394
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffset.ru/aws?keyword=dish+guide+not+working PDF link annotation
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/8057511.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408712/normal_5fa1dffb5bb64.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/3015647.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/2028741.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/1009128.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/5754433586.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/bufubofilijaxan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456134/normal_5fa45e84beeb7.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/5b988b12-4bb1-4f12-9f08-057264afd5be/bissell_deep_clean_deluxe_pet_instructions.pdfIn PDF document text
    • https://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
    • https://devoromul.files.wordpress.com/2020/11/maplestory_reboot_cubing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/turewod.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_off00006bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFA 5000 bytes
SHA-256: b7b86f9310f867d00052be7698bbfc0b8058268fe6d99a18cbaac9c7cad82695
font_01_sfnt_off00007d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0D 10872 bytes
SHA-256: a0170f300ea1dc8df76c8dec9de2470909e0513cbe2295d8083c4918eda6087e