Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d527a4a90b1eb2…

MALICIOUS

PDF

54.5 KB Created: 2020-10-03 10:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c91cf9a2d0b4e59c32746388c534424f SHA-1: e74e3ee051527028ba5fe8d806f9f5be186ee6d4 SHA-256: f3d527a4a90b1eb207d58afd955029453b3e67c28c58e55e2a4d19e5efe9c20d
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://cctraff.ru/strik?keyword=7+mountain+mandate In PDF document text
    • http://files.drkatieskitchen.com/uploads/1/3/0/8/130874539/juvosusenatame.pdfIn PDF document text
    • http://files.topstonecanada.com/uploads/1/3/1/0/131069886/tinedaxilideka-meruvofakufeb-gidatuwebexavel.pdfIn PDF document text
    • http://files.bestdayeverevents.nl/uploads/1/3/0/9/130969053/mosanera.pdfIn PDF document text
    • http://zibekiked.galafordreams.com/uploads/1/3/0/8/130874254/zevat.pdfIn PDF document text
    • http://files.uwmcm.org/uploads/1/3/1/6/131637402/zinanude.pdfIn PDF document text
    • http://megesut.aishi.co.uk/uploads/1/3/1/4/131410007/6638053.pdfIn PDF document text
    • http://files.bycoryshaw.com/uploads/1/3/1/4/131453902/7758153.pdfIn PDF document text
    • http://ketuwubel.mountainmasoniclodge.com/uploads/1/3/2/6/132695615/9094293.pdfIn PDF document text
    • http://buboxo.needleartsonpaper.com/uploads/1/3/1/3/131398425/tefaw-xakozexin-gakek-pezipewawo.pdfIn PDF document text
    • http://bujik.dididiphotography.com/uploads/1/3/1/6/131606490/rofekewus.pdfIn PDF document text
    • https://site-1037176.mozfiles.com/files/1037176/musitudexelilivuvuraxu.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/vusunafevogen.pdfIn PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/14937068953.pdfIn PDF document text
    • https://site-1039505.mozfiles.com/files/1039505/safokap.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/7134635918.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/b8c0498e-18f8-44ae-8190-b0568a8b5a4b/40548746790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4a9f14a-40ac-4c5f-a993-176095b569ac/22261599466.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_off00008b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B15 4532 bytes
SHA-256: 8f3bc3b73f85fd10db104761ce67c172b0154f842f0083d5b4cf39a4e79f534a
font_01_sfnt_off00009a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A61 11048 bytes
SHA-256: 602b213ac3aa2865c20643c063634891ebd910ea5d9f64bac5b3e8d282ab92b8
font_02_sfnt_off0000bf06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF06 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71