Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4d31dd2df1724c…

MALICIOUS

PDF

61.7 KB Created: 2021-02-24 14:22:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ba98a8a62ed12bd5a3d582d2774aa0d5 SHA-1: 7b61a8c06055553a067180cd846f59bb42c29daa SHA-256: 4c4d31dd2df1724cd9a716dd18e7198c8617195f4dde9e384f6d4d2bff62a905
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jacksth.ru/aws?utm_term=phrasal+verb+quiz+esl PDF link annotation
    • http://confirmyourverifiedbadge.com/android_one_9_mi_a2y89mp.pdfIn PDF document text
    • http://wofevil.22web.org/huawei_watch_gt_display_faces.pdfIn PDF document text
    • http://slampochka.ru/chicago_style_citation_format_exampleeqytt.pdfIn PDF document text
    • http://niluxedofodip.22web.org/84396965593.pdfIn PDF document text
    • http://pomuropujuj.22web.org/goalkeepers_report.pdfIn PDF document text
    • http://siteznakomstv69.space/77593748278v6vel.pdfIn PDF document text
    • https://cdn.sqhk.co/noxisoture/ghdwaif/jakolekanu.pdfIn PDF document text
    • http://adminhalil.com/bodevegemegav7bfia.pdfIn PDF document text
    • http://art-practice.org/can_a_tracfone_be_unlocked0stl0.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/jadghgh/police_car_chase_live.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jenepopavuse.epizy.com/sijegerurosokekuvusomo.pdfIn PDF document text
    • http://pomisukiso.rf.gd/abstract_nouns_worksheet_for_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/23388543004.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/goxojugedoxote.pdfIn PDF document text
    • http://zagenududabeg.rf.gd/kobofefodog.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_off0000b568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB568 5148 bytes
SHA-256: cce75a025e294e0c1736627ebc580f5e8a75c799c130e37377be749bf57d8b1c
font_01_sfnt_off0000c6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EF 10448 bytes
SHA-256: 40a9b567bfabb1702ecdeb775c80f9f3fa8949dc58299bf39e4497aeb3f17b76