Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3dbcf1e4950173f…

MALICIOUS

PDF

47.6 KB Created: 2020-10-16 04:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1ad90a0687a6581f7a323c5af3d8e6a7 SHA-1: ae12383541bdd3df88f7899ad27562702a927924 SHA-256: d3dbcf1e4950173f6113510938a356cb282786739f381b6ae2313d192b6d2fc5
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/pify?keyword=mastermind+teacher%2527s+book+pdf In PDF document text
    • https://site-1042187.mozfiles.com/files/1042187/luzavapodusisodenoxitadig.pdfIn PDF document text
    • https://site-1041933.mozfiles.com/files/1041933/losobubugon.pdfIn PDF document text
    • https://site-1044192.mozfiles.com/files/1044192/delicious_world_apk_mod_download.pdfIn PDF document text
    • https://site-1039954.mozfiles.com/files/1039954/12733191234.pdfIn PDF document text
    • https://site-1037005.mozfiles.com/files/1037005/13340770143.pdfIn PDF document text
    • https://site-1042107.mozfiles.com/files/1042107/sebulowu.pdfIn PDF document text
    • https://site-1040262.mozfiles.com/files/1040262/duxiwabetixevejixabipixeb.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/5715109726.pdfIn PDF document text
    • https://site-1044253.mozfiles.com/files/1044253/xolovosi.pdfIn PDF document text
    • https://site-1039711.mozfiles.com/files/1039711/4166779561.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/vifotatilaw.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/vovofofaverun_sawivurovoj_nifawubazox.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/4799565.pdfIn PDF document text
    • https://jedarixires.weebly.com/uploads/1/3/0/9/130969076/vemir.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/bivijiki.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/nozonuvodovazigev.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/1691bafa-f1ec-4565-bf09-f7c875df5da3/linuxuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a42e6f-c407-43ef-a4c0-dfd4c09c77ea/40457478059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b190b73c-41a6-457c-b0a4-0bd2902e5178/17865469729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4074b1-df53-4179-a126-664470ef0bea/69891686647.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_off00007b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5E 5608 bytes
SHA-256: 0a674166b65de9e53f6223335af3a6d6a3d0ff43b4e171ceec4bcfa5d57c1a89
font_01_sfnt_off00008e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E3C 10276 bytes
SHA-256: 2fd0366427e2b2260a946e4d5ddf3bed6426a32732edb1bfcf76b5f9d70209b6