Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c06ad7f85d3531…

MALICIOUS

PDF

49.9 KB Created: 2020-11-09 07:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 8b31c924ebd994f08a6e20bef4cf526c SHA-1: 0ea304fc7fe8b70b437b2ec25d360e2859c81bd2 SHA-256: e2c06ad7f85d35310d3c61b03de4ed2507d41dbd5302ac1304005ac0e7ddcb7d
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/123?keyword=enpc+study+guide+for+nurses In PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/7772900.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/e7cb701a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_5f894696316e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5f93f11e7cdef.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/jaduwo.pdfIn PDF document text
    • https://befekibeje.weebly.com/uploads/1/3/4/3/134319248/mijamid_tifipuma.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/sobotumatuxifiz-ruteposatel.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/3a1e2579-5d1d-4aae-9b90-a9170aaab59e/71587505439.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e79d42-21c2-4788-b630-461b22fba60b/35328032828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48568468-f6e6-46a2-b06a-60aa94d4d061/95263057329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba4744d-26cf-4fa0-8c6c-958585c67b3b/zepav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b74f0ea5-9e77-4400-b4f9-b42e74edfecd/jabunivunegesuvedelitir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d95d618d-8348-4328-9cc8-8551c85be020/apple_pie_travis_scott.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_off000082cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CF 5140 bytes
SHA-256: 649971ad11bd90e895c74e5bb39dc9cf131d759f5d097881e1dd83445e074bc3
font_01_sfnt_off00009474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9474 11228 bytes
SHA-256: 2510ed54ab4fed0c0bb184962d355926fa703a41d88d799de469b406efd82d01

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