Malicious PDF — malware analysis report

Static analysis result for SHA-256 e757226e72e72e16…

MALICIOUS

PDF

34.4 KB Created: 2020-10-05 02:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4d9dc68c1e528e23f01edef85079bbb6 SHA-1: ea2885c206299680dbe4ff76338b923388953ded SHA-256: e757226e72e72e16d96e90519d461240420a8832a140801e5222d0f2bb4f1b73
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://cctraff.ru/strik?keyword=deadpool+2+film+streaming+vf+gratuit In PDF document text
    • http://files.leader-follower.org/uploads/1/3/1/0/131070212/5397374.pdfIn PDF document text
    • http://files.rivalme.org/uploads/1/3/1/8/131872015/bebumeki_kagexozo_tugibok.pdfIn PDF document text
    • http://jafagox.topthatcakedesigns.com/uploads/1/3/0/7/130775258/5c2772869.pdfIn PDF document text
    • http://mifozon.propt.net/uploads/1/3/0/7/130776418/tofezunob_lakategux_tepudo.pdfIn PDF document text
    • http://files.sparkycarpetcleaning.com/uploads/1/3/0/8/130874207/754593.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/1/0483/5980/0983/files/terner_watch_wr30m.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5461/0070/files/ghost_adventures_enchanted_forest_oregon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3867/6894/files/86263934942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18098c61-e311-4859-9746-593eec850d82/91649986056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/417b1957-5837-4efd-a5c9-003a88a70b6d/38573139980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e0f1904-c7df-4757-95e9-0c9dd043281c/xosolipeguxajos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/8930/8064/files/the_empowered_wife_audiobook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9050/1020/files/game_boy_advance_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5739/9976/files/39096095044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3311/6317/files/jabalose.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_off000048ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48ED 5552 bytes
SHA-256: 371a4b7063711f7a1f58edce944de63beb9fcac4c7b68cc9734b5a08bc0ab552
font_01_sfnt_off00005bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCD 9736 bytes
SHA-256: 5bd86760b7f0d48e6bb1af24f5e90c19c0f17030be33dc56ccc6caa019e7720f

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