Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0cda60a04922e3…

MALICIOUS

PDF

75.4 KB Created: 2021-02-16 01:44:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 33359b104155931f43a7f81a251353ee SHA-1: e5f22ed1809921f3f4bd633b5804a1168d1a5361 SHA-256: 3f0cda60a04922e319bee3eeda7f069aef00bb0b88e37eb5e2e7bac96b4d7ff9
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains numerous embedded URLs, many of which point to disposable domains and are flagged as malicious redirectors or link farms. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a strong intent to redirect users to harmful content. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the overall structure and URL analysis suggest this PDF is designed to lead users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wix?keyword=races+of+eberron+pdf+3.5 In PDF document text
    • http://wiinorama.space/itranslate_translator_dictionary_pro_apk_free_downloadz9yhv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529977/normal_5fe9cac3ee715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467004/normal_602494fd88089.pdfIn PDF document text
    • http://lolkek.xyz/41395275901l0zkj.pdfIn PDF document text
    • http://lg-copyright.com/von_mises_combined_stress_equation41svf.pdfIn PDF document text
    • http://zanexipizuzog.iblogger.org/lather_and_nothing_else_questions_answer_key.pdfIn PDF document text
    • http://uaregroup.com/word_association_test_with_sentenceslitaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385852/normal_5ff0887c3b0ea.pdfIn PDF document text
    • http://povar2020.site/alarm_clock_mac_download_freew3ay9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_5fd1e6ce25e2b.pdfIn PDF document text
    • http://cosmosqrab.online/sound_of_silence_disturbed_tabuxxmi.pdfIn PDF document text
    • http://parkji5x.xyz/21918015853fqtm9.pdfIn PDF document text
    • http://ital-girl.space/victorinox_inox_watch_bandjvgeo.pdfIn PDF document text
    • http://jetaxopavajuluw.22web.org/will_turtle_beach_stealth_600_work_on_ps5.pdfIn PDF document text
    • http://gufelujoziwuki.iblogger.org/insinkerator_evolution_installation_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475866/normal_5fd637eeda912.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dovanokeji.epizy.com/74710186662.pdfIn PDF document text
    • http://rupewilalefapok.rf.gd/zaguliwonix.pdfIn PDF document text
    • http://vezexosewomex.epizy.com/royal_jelly_essence_mask_sheet.pdfIn PDF document text
    • http://wolaxagemir.rf.gd/ark_survival_evolved_ps4_guide.pdfIn PDF document text
    • http://defafezo.epizy.com/erosion_landforms_water.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_off0000e99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 5584 bytes
SHA-256: 35f2ec818c5f3b26072e24e38c8adcf25ea59a4ed65393070093afd053bd8142
font_01_sfnt_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 10432 bytes
SHA-256: 332ecc29409b5010a0c886e35373c7545eaa90a41022cffaadfaf9f05a78ecf7

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