Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e50a246eb39999…

MALICIOUS

PDF

59.3 KB Created: 2020-10-11 23:53:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: fd9d640075418e31663e692d559fd560 SHA-1: 1602e82ce3ec47fea952f6f4e03fec1763359c7f SHA-256: d4e50a246eb3999903283b0cd40b38c16713f72a5d6e8e85ff5f5a37b43e64fa
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=dragon+ball+fighterz+servers In PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/tufotujijevatatesawonozuf.pdfIn PDF document text
    • https://site-1039754.mozfiles.com/files/1039754/45449254143.pdfIn PDF document text
    • https://site-1044053.mozfiles.com/files/1044053/jizetiveviwelokezujewuta.pdfIn PDF document text
    • http://libural.riverraisinconference.net/uploads/1/3/1/4/131410399/fafeb99c2ec1e15.pdfIn PDF document text
    • http://files.stewardsfortomorrow.org/uploads/1/3/0/8/130874283/nanojujewol_sulixar_gifagol_sinunefoveme.pdfIn PDF document text
    • http://files.theologythatsings.com/uploads/1/3/1/0/131071157/wotipas.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/f646d742-b3c6-4159-a517-fb1079b7f0de/6746261334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9918f733-fe71-4559-8718-d4e9fcbef78c/minivujijerosune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaed5991-866c-4901-a207-e75be43d7559/48720342048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb30665-a271-4f88-9fc4-3b3f68959a42/tujikixulowezaxasudajosiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2192/1177/files/alan_watts_wisdom_of_insecurity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6583/0297/files/dropbox_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/gefefekenaberijogik.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_off0000abb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABB9 5280 bytes
SHA-256: 5509d10336a3bc7758ee41229d75d76702e1c5c519b58a6436343bc0127d4af6
font_01_sfnt_off0000bdb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB3 10192 bytes
SHA-256: 85627bc9344956b8610eaec9ab08cfe8b4e00be1bbb10b7fc23dd420b10c1a4d

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