Malicious PDF — malware analysis report

Static analysis result for SHA-256 e41653e8003e2119…

MALICIOUS

PDF

43.2 KB Created: 2020-10-10 09:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f6691ef55aba0a70e872f38fb70f6620 SHA-1: 848da8eff79d060fab5e7da7cfcefea006c23944 SHA-256: e41653e8003e21193aaa93cec984653149274c548f33b506fa45a90df2500251
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=business-level+strategy+focuses+on In PDF document text
    • https://site-1038438.mozfiles.com/files/1038438/bemupilupotokugiburawod.pdfIn PDF document text
    • https://site-1038321.mozfiles.com/files/1038321/1252186185.pdfIn PDF document text
    • https://site-1038575.mozfiles.com/files/1038575/musiwurap.pdfIn PDF document text
    • https://site-1039817.mozfiles.com/files/1039817/7019137664.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/91509658288.pdfIn PDF document text
    • http://files.mariesplacemusic.com/uploads/1/3/0/7/130739769/dobekufomawujop_fapejetajumekiz_moxinef_suzawojedujiv.pdfIn PDF document text
    • http://files.traditionalupholsteryschool.co.uk/uploads/1/3/1/3/131381518/45bf6.pdfIn PDF document text
    • http://xuweduza.wes-pto.com/uploads/1/3/1/1/131164067/20606.pdfIn PDF document text
    • http://jumit.danielleeasler.com/uploads/1/3/0/8/130873843/1febb5d4162ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/minecraft_zombie_pigman_drops.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6271/8364/files/vtech_cs6719_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f47db55e-a23a-4589-b76f-a8112da2d3b0/62105574743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c73bea17-2ec8-4669-a415-01cc9dbbefbb/47486688024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ee6698-c5ec-4cec-8216-0820a5e6edc2/mujudatimado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/410380be-3a83-4c0a-a8b0-c4423e64511d/72254439206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e2b778-97af-4437-babd-5087a460cddb/veruwaduxojabizuvi.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_off00006a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6D 5292 bytes
SHA-256: 1546c71cc7c09d91415a70e643a06d43c0a55db0ab23cd3504b9cdbb066decbb
font_01_sfnt_off00007ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA0 10444 bytes
SHA-256: 7f18185625b5a5c70c3c212f1ef497c9b1b1a9f452e4598bd7db3550e815dae0

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