Malicious PDF — malware analysis report

Static analysis result for SHA-256 753fccfcc1e12428…

MALICIOUS

PDF

38.0 KB Created: 2020-10-04 00:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0a81e3babb735a06d65cbe8f5b090fe8 SHA-1: a089083fea249b5021ebd1ce52264bbea7659fbb SHA-256: 753fccfcc1e12428c304fde4f4b365e521e5f0a1ed2aaf6b42f37fda2d899315
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=asus+gtx+960+driver In PDF document text
    • http://files.west-pro-installations.com/uploads/1/3/2/3/132303028/f5baac8b7.pdfIn PDF document text
    • http://files.bandoncoosbaybuilder.com/uploads/1/3/0/8/130814172/xazegajaliw.pdfIn PDF document text
    • http://terijel.homehealthbettercare.com/uploads/1/3/0/8/130874376/lizez_pupomalod_beteludirem.pdfIn PDF document text
    • http://files.scvcsd.org/uploads/1/3/2/6/132695730/8780571.pdfIn PDF document text
    • http://siweb.carolmeadsart.com/uploads/1/3/1/4/131453960/40bac6d1884291b.pdfIn PDF document text
    • http://files.texasbrokersponsor.com/uploads/1/3/0/7/130738806/d1e4f4dc.pdfIn PDF document text
    • http://files.autismcenterkenya.org/uploads/1/3/1/3/131383305/kaxilirogano.pdfIn PDF document text
    • https://site-1038611.mozfiles.com/files/1038611/xonitilezejote.pdfIn PDF document text
    • https://site-1040136.mozfiles.com/files/1040136/77518697990.pdfIn PDF document text
    • http://files.juliapittcoaching.com/uploads/1/3/1/4/131437756/2212920.pdfIn PDF document text
    • http://ziluti.siouxnarrowsartsfestival.com/uploads/1/3/1/4/131453870/c0ef7adb50.pdfIn PDF document text
    • http://files.proridersaddlesllc.com/uploads/1/3/2/6/132682232/4769a10eb6455.pdfIn PDF document text
    • http://lobusu.simplybprints.com/uploads/1/3/1/8/131871780/f1019bb64.pdfIn PDF document text
    • http://files.writethegoodfuture.org/uploads/1/3/2/8/132816066/zizebad_sulaguvobedad_povumiduv.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_off0000506f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x506F 5320 bytes
SHA-256: a4d46adecbc5410634df087b91c6665909d4dc5ede594abac84b22687bf1b8a8
font_01_sfnt_off000062a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A2 12692 bytes
SHA-256: dec5ebecaeaa0a189b41fdf483297cefcaaf17d4f1326c8fa51626627279d522