Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c46384278d6694…

MALICIOUS

PDF

71.0 KB Created: 2021-02-25 17:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9eedeebc9eedb6d32e3b7351c90d2776 SHA-1: a908e9d656e15934464d624c6b2332c73838d7a2 SHA-256: b6c46384278d66946a7147224766aac4fa7cbbdfe81416fa67c3182e2df5d1a1
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wb?keyword=how%20to%20build%20a%20house%20easy In PDF document text
    • http://mscgis.net/fuzevel0d7b6.pdfIn PDF document text
    • https://nupinegudoxaxu.weebly.com/uploads/1/3/5/3/135350485/vibulebafug.pdfIn PDF document text
    • https://vukujaxirebes.weebly.com/uploads/1/3/4/1/134108713/zovik.pdfIn PDF document text
    • https://sofirutowik.weebly.com/uploads/1/3/1/3/131381411/jawiwove-mewimesagi-xevokugikipib-gorapufesaf.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/shark_world_tap_pocket_mod_apk_unlimited_moneycqzte.pdfIn PDF document text
    • http://timinome.getenjoyment.net/4888629405.pdfIn PDF document text
    • https://wojaginobaxap.weebly.com/uploads/1/3/1/8/131857211/8988176.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/51687503475.pdfIn PDF document text
    • http://sokfresh.fun/portugus_para_concursos_eduardo_sabbagr6pui.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/bibamerunapezorolozamamep.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/ariens_st824_engine_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/cheat_app_for_gta_vice_city_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/relodig.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/consumer_reports_car_tire_ratings.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/63728207750.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_off0000d98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98C 5112 bytes
SHA-256: 25d295f20de510cf20e5945f4c5b1646600f1729517eb8aa8daad4562e58d97c
font_01_sfnt_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 10632 bytes
SHA-256: 9d5c7581b4c15d7cc3dcec87b5fd6f06eca014ec6085d93217045dabbcd68678