Malicious PDF — malware analysis report

Static analysis result for SHA-256 e177e9563a2e344a…

MALICIOUS

PDF

77.1 KB Created: 2021-04-03 10:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4ba01288bf1b29d6818cd087664a7799 SHA-1: 0278d3956e6f26eb993607451c4bb14ac1fe7d2e SHA-256: e177e9563a2e344a5c88b31d3608989f5db409d9276497a56317ba4559aa4ef8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/wix?keyword=cell+reproduction+worksheet+section+8-2 PDF link annotation
    • http://juxoxelobonoje.22web.org/atomic_structure_worksheet_chemistry.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/0qghibJ/papikutofuzerawumolef.pdfIn PDF document text
    • http://mudikovarew.mygamesonline.org/jarolavavigulaparol.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/iihhef5/96373328558.pdfIn PDF document text
    • https://cdn.sqhk.co/vovusupa/4hfheeh/nulovamebuwixuzoto.pdfIn PDF document text
    • http://fijazubelanulek.mywebcommunity.org/maladaptive_behaviors.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/gd2nMS4/99894363217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469640/normal_60173b053a144.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/zobedumujom.pdfIn PDF document text
    • https://cdn.sqhk.co/xizefonuma/cGjcgck/messi_hd_wallpaper_2020_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405443/normal_5fe02f93526ca.pdfIn PDF document text
    • https://cdn.sqhk.co/porosobof/vjcQOn1/zulutiviroxabefik.pdfIn PDF document text
    • http://nobukuxokosiga.mypressonline.com/punctuation_comma_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/vOo1ieQ/37701675900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://posikin.myartsonline.com/what_are_the_different_types_of_writing_skills.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b058e1d7-2ce7-48cf-b4ae-fee46d96e351/xerufu.pdfIn PDF document text
    • http://sotemapepuko.epizy.com/jededinug.pdfIn PDF document text
    • http://libejejizu.epizy.com/xadobimitapomusuluduri.pdfIn PDF document text
    • http://fosekor.epizy.com/neverending_story_lyrics_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ce18c8-fdee-4da4-9c36-afb0310285f9/quadrafire_mt_vernon_thermostat_problems.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_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 5368 bytes
SHA-256: 82f94446a191873c0fd9409d3d4885f583787f3a7f42f625baeb36d28e6a2f80
font_01_sfnt_off00010509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10509 10072 bytes
SHA-256: 541a7dcf727b31764a0ffc916a4e2de79ce40bb758b4a21389694408c4532cb6

Open this report in the interactive analyzer, or submit your own file for analysis.