Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17b919b3f692528…

MALICIOUS

PDF

44.0 KB Created: 2020-10-16 21:20:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 95d0d81489059c4a89a1ef61fae52dc1 SHA-1: 7f54e7026e5289c7dba55e43f9afe148764f0517 SHA-256: c17b919b3f6925284e70e0999b40e5a3a0ffec15a9c36b2f98158a8e33453d51
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/123?keyword=functional+skills+maths+l1+worksheets In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1158663.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/xaloni.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/3cb113af6.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/4e0d994f.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5f8891c45c315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372371/normal_5f8879f4f1c2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f88cba117925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f88acd20f878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_5f88fb6609997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f874ada83d11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f8721fde1790.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f87f47025076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f87797024e5d.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/1/0495/9089/4755/files/35147015993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2056/9752/files/91226344931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2918/6718/files/wegiwinivapepilepab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef2631e-5310-49e3-8f43-04c81d56bb16/31720857095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b93b71-41e3-4b5e-b6dd-0ca9e90ca4e2/mivawenoxipojojurevogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e51145-5468-46e6-8ea1-3f2382b7f4fe/66740657002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5fe8c8-2ffc-4e3d-9f2c-41d47b629c97/wegalopit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d05541b-63e2-4161-b231-eab55c8ad7f3/6215823277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8484/9045/files/button_mushroom_growing_kit_australia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4455/files/23169102970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8326/0838/files/23921987418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/menifee_union_school_district_calendar_2015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7813/9035/files/wet_and_wavy_wigs_with_bangs.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_off00006ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED6 5204 bytes
SHA-256: 5568d5f2088b1589b80a1afb04493315f9b0395c4847e454df0c36c28802b99f
font_01_sfnt_off0000806d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806D 9992 bytes
SHA-256: 9cd1a235b59199787e9b6c6ac466e9ddf02f811901b559cfcc1dd3577eecf75d