Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61f09b7b2023259…

MALICIOUS

PDF

72.4 KB Created: 2021-02-02 17:43:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8751c4da7bb9f7782413a08d0a492e0d SHA-1: febf5153143f741913e84480f44a6ae813220761 SHA-256: d61f09b7b20232596643079713a2ce7e4440b1c42eb4dc2e4d22930b26d9fe14
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://crophysi.ru/aws?utm_term=ibps+guide+reasoning+practice+set In PDF document text
    • http://tortomsk.ru/setagokubivaxukenominog5y2cp.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/Lyjbgix/65167392302.pdfIn PDF document text
    • https://nokurujifeseg.weebly.com/uploads/1/3/4/3/134355409/rodud_febagozuledi.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/diegdgg/un_latigo_in_english.pdfIn PDF document text
    • https://zupakikaxabu.weebly.com/uploads/1/3/1/3/131380404/wadadurupamenar-vasegejafenenu.pdfIn PDF document text
    • http://apparently-home.com/73300969300xvhnw.pdfIn PDF document text
    • http://fanexaxujuto.22web.org/cadet_kelly_full_movie.pdfIn PDF document text
    • http://vnds-super.space/cidade_dos_etreos_online9y33v.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/96CQrKe/mr_katana_wagyu.pdfIn PDF document text
    • http://retys.space/walufoxazrve8m.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/ggIiesQ/61365117494.pdfIn PDF document text
    • http://alcexpress3.xyz/clash_of_heroes_apk_download_2020wjr6f.pdfIn PDF document text
    • https://zanolidades.weebly.com/uploads/1/3/2/6/132695759/bilarefitezit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/86573885092.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/xavejul.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_off0000dddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDB 5288 bytes
SHA-256: f2c1fbc51567767d04611f3b9b9e793fe1709d1baf5f10c67ccd131a086fad46
font_01_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 10876 bytes
SHA-256: fe32138367ecba6258bb0156f160ef1e67593b940a3c4dc30dfedfc97d1bf437

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