Malicious PDF — malware analysis report

Static analysis result for SHA-256 f578582bc7b61fed…

MALICIOUS

PDF

69.4 KB Created: 2021-01-25 20:27:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e58179dc051fddc394dbf811d4f40810 SHA-1: 1de109732aabbb442143462b0a65c4462d2881af SHA-256: f578582bc7b61fed0829e8dc26f7000beca823a3b921a61654155cf3c3a2558b
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wb?keyword=female%20race%20car%20driver%20killed%202018 In PDF document text
    • https://zejasuvosoropaj.weebly.com/uploads/1/3/5/3/135345482/posapoparikunawom.pdfIn PDF document text
    • https://wunepilupizuxo.weebly.com/uploads/1/3/1/8/131857535/7663346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389365/normal_60082f29f186a.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/29e4c02e529ef.pdfIn PDF document text
    • https://sorezoxawo.weebly.com/uploads/1/3/2/7/132712551/fologilax_mebapomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420438/normal_5fe7f5d1c0553.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446930/normal_5fdc7f0735c1f.pdfIn PDF document text
    • https://legutuxubumid.weebly.com/uploads/1/3/1/8/131872058/kasigasudoxuvusedofe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tesoxukezeziles.epizy.com/monthly_calendar_2019_excel.pdfIn PDF document text
    • http://zonisitis.rf.gd/muzokobizenifexitiweboku.pdfIn PDF document text
    • http://pavasokunise.epizy.com/13741675522.pdfIn PDF document text
    • http://kubuxakul.epizy.com/avengers_movie_collection_in_tamil_2019.pdfIn PDF document text
    • http://pasazaxara.rf.gd/architecture_articles_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/holding_hands_around_the_world_sheet_music.pdfIn PDF document text
    • http://wuzatefiroko.epizy.com/android_system_apps_running_in_background_notification.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_off0000d129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD129 5508 bytes
SHA-256: e7cfdde57ee6c4e5774a197118c676093a0899f6c98637a6bc5239a92962753f
font_01_sfnt_off0000e3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D7 10928 bytes
SHA-256: fabcbbe11acf91f5e7813e83a7b74e9d18382a447bf5e3aa4bbca73f4610077a