Malicious PDF — malware analysis report

Static analysis result for SHA-256 383200d91977dbba…

MALICIOUS

PDF

42.9 KB Created: 2020-10-08 07:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5ff7f9af63d547673906dcdd45fa0db2 SHA-1: 81bec20eba2392f015782fdfec7f643f4db4b0a8 SHA-256: 383200d91977dbba7b2b7c132147a556b3471870db972e3b83a87bd4311b8c62
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://gettraff.ru/strik?keyword=ready+player+one+online+free+download In PDF document text
    • http://radozi.mostlysunnyisolatedshowers.com/uploads/1/3/1/1/131163981/kokiwodon.pdfIn PDF document text
    • http://files.alleghenybuilders.com/uploads/1/3/0/8/130874075/napaxudowem-nivefasakowufu.pdfIn PDF document text
    • http://jivov.aimeespetcare.com/uploads/1/3/0/7/130739204/7759023.pdfIn PDF document text
    • http://files.dogtagsprogram.org/uploads/1/3/1/4/131405948/8254898.pdfIn PDF document text
    • http://files.ecamrl.org/uploads/1/3/0/9/130969810/9879342.pdfIn PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/towenafugele.pdfIn PDF document text
    • http://files.greecepaint.com/uploads/1/3/1/6/131636644/lebefoborotod.pdfIn PDF document text
    • http://nomiv.hmc-cpas.com/uploads/1/3/1/3/131383726/kajekut.pdfIn PDF document text
    • http://pajuzoful.readimun.org/uploads/1/3/1/6/131606156/reduguze-bofufazekasa-fedezoxovusunid.pdfIn PDF document text
    • http://zisina.hancockseacadets.com/uploads/1/3/0/8/130815031/d2d4d36cb5abf1.pdfIn PDF document text
    • https://site-1042635.mozfiles.com/files/1042635/74755946807.pdfIn PDF document text
    • https://site-1036725.mozfiles.com/files/1036725/kamatosovibepuwev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000069fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69FB 5060 bytes
SHA-256: 1b8c97925d3238029946d2017fcb8bf324503d59ca3a40e6d24a135374f3c4e4
font_01_sfnt_off00007b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B60 10432 bytes
SHA-256: ab249f9fcbda88a0c3f81e1eae992aedcc0b75058a539d66fdc8328e4e4ffa97