Malicious PDF — malware analysis report

Static analysis result for SHA-256 444bf274167b8e52…

MALICIOUS

PDF

71.2 KB Created: 2021-02-11 15:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b3eb5073c4bf5e867b4ce84e0b65e849 SHA-1: 4f08225b4ec20e982e529094c0bc7e6ba6cdf195 SHA-256: 444bf274167b8e521c994c26c65b97a42c878ac651650e0e8deb98575f6028ec
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://crophysi.ru/wix?keyword=freedom+no+root+apk+download In PDF document text
    • http://sonifakeki.22web.org/architectural_symbols_and_their_meanings.pdfIn PDF document text
    • http://eu-study.ru/rsp_chiseled_day_1gpoff.pdfIn PDF document text
    • http://teksalle.xyz/bilisrmvny.pdfIn PDF document text
    • http://arm-watch3.club/30592832002teo17.pdfIn PDF document text
    • https://cdn.sqhk.co/rekosiseweno/hdZihja/vovisavedin.pdfIn PDF document text
    • http://amsidgi.xyz/magavubiweximupipg2y2z.pdfIn PDF document text
    • http://richmaya.site/blood_episode_1wir5r.pdfIn PDF document text
    • https://cdn.sqhk.co/duzupafuj/Yu7igWP/28688780281.pdfIn PDF document text
    • http://kreativoblako.com/29269714186ayl8u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fd7b457cd531.pdfIn PDF document text
    • http://itverys.space/bovujaxadradja.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/iigfAie/driving_school_3d_mod_apk_revdl.pdfIn PDF document text
    • http://groby-ritual.online/wobupexek5127.pdfIn PDF document text
    • http://baugroup.info/hello_app_video_kannadam7bwc.pdfIn PDF document text
    • http://1xbet-football.fun/varatewijajuvojibewerewkzkm9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://posewabenuxinot.epizy.com/venture_capital_funding_report_q1_2018_pwc.pdfIn PDF document text
    • http://fuvarob.epizy.com/fimekirapovetujuros.pdfIn PDF document text
    • http://loxexezusus.rf.gd/injury_report_players_nfl.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_off0000dbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEF 5040 bytes
SHA-256: 09fde6b56a1c8d8403af9372d6d781c378ab556e0bcd1e9577e3905d0b7e7a0b
font_01_sfnt_off0000ed10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED10 10184 bytes
SHA-256: b24eaa2d9e63557b1a9c6ffd0ab51202e738b56a4f551a4d71e4bc0c669345cc