Malicious PDF — malware analysis report

Static analysis result for SHA-256 4df7a2479d4f6b46…

MALICIOUS

PDF

62.6 KB Created: 2021-02-05 13:54:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 061e2cd467ece0f9a78e1090326266bd SHA-1: b450a11568a479e4cbdfbd8e8798cd26f6489618 SHA-256: 4df7a2479d4f6b46d4d6ac97effe37a28281ca80242574ad5e411172df86d87e
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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/aws?utm_term=microsoft+excel+id+card+template In PDF document text
    • https://cdn.sqhk.co/jejefudebuxi/jajaVjK/baboli.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/fibYjbD/crash_team_racing_settings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_6016663fbbd7f.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/gdiiejj/80377303234.pdfIn PDF document text
    • http://temezisabekazev.iblogger.org/holy_bible_in_english_and_shona.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417815/normal_600024383c826.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5ff9fe26f0cd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5fd821b88264d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5ff3cd1770b53.pdfIn PDF document text
    • https://cdn.sqhk.co/lixozimiz/jbhbghK/boat_drive_in_los_angeles.pdfIn PDF document text
    • http://kasumunanivux.iblogger.org/55002909786.pdfIn PDF document text
    • http://bipiraxas.iblogger.org/global_competitiveness_report_2018_education.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/gdwNih5/random_word_generator_python.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jomozaredid.rf.gd/mavezimixejatabup.pdfIn PDF document text
    • http://xediguvodolej.epizy.com/pezudilofawakudosig.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_off0000b9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9DD 5376 bytes
SHA-256: 5ec6fb4cb86c15b1ac3df50e645a473a596f54b7adc956fda5d189e8a042e26b
font_01_sfnt_off0000cc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC1F 9756 bytes
SHA-256: 1f1204b903e507282ab8ac4710fae08a39117f6f1ac94ecf9ce85ceec2b60b69