Malicious PDF — malware analysis report

Static analysis result for SHA-256 057c8df95128876d…

MALICIOUS

PDF

80.9 KB Created: 2021-02-21 16:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5f56559bad9b2e95362777dfc95a0c11 SHA-1: 113f97c263ed5680e0e1bf1c430b15d6ba563884 SHA-256: 057c8df95128876df9fb638f39d79659446cd1e8f9caed2a9477b241f18bcaf6
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting and redirector infrastructure, indicating a phishing or scam attempt. Heuristics confirm the presence of malicious redirector links and a link farm on disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious sites, likely for credential harvesting or malware distribution.

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/wb?keyword=stephen%20king%20gunslinger%20tv%20series In PDF document text
    • http://jetavimazi.22web.org/simple_thank_you_email_after_interview_template.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/ghgdxkA/14430179996.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/80234274356uyzpw.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/ggciaib/unicorn_skins_for_roblox_app.pdfIn PDF document text
    • http://girlita.space/instagram_dark_mode_not_working_android_9lpnoh.pdfIn PDF document text
    • http://lerinumemikiw.22web.org/defensive_driving_test_answers_georgia.pdfIn PDF document text
    • http://vizionsmc.net/how_do_i_connect_my_phone_to_my_kyocera_printergr7if.pdfIn PDF document text
    • https://cdn.sqhk.co/jukunobegabe/ajfiiii/lidise.pdfIn PDF document text
    • http://toolsbestpricemicrometer.site/la_gallina_degollada_horacio_quirogaj8rrc.pdfIn PDF document text
    • http://xtrading.buzz/how_to_work_the_ninja_professional_blender6ja0l.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/nisiwanolom/64351981967.pdfIn PDF document text
    • http://wuzorijo.rf.gd/36115884672.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/lightroom_tutorial_free.pdfIn PDF document text
    • http://gavojomizam.epizy.com/aptitude_questions_and_answers_for_mba.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/mechanical_engineering_salary_uk_2019.pdfIn PDF document text
    • http://kirotomi.epizy.com/adarsha_hindu_hotel_ebook.pdfIn PDF document text
    • http://fisejotigu.epizy.com/boston_celtics_able_schedule.pdfIn PDF document text
    • http://misosemarimo.rf.gd/8368499932.pdfIn PDF document text
    • http://zokivobadid.rf.gd/annadurai_movie_songs_kuttyweb.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_off00010125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10125 5100 bytes
SHA-256: 608c9697fa1d039bc4a50f110591f87575b477fe6a346482ab389eb5bbdeeace
font_01_sfnt_off00011281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11281 10732 bytes
SHA-256: 3bb179bb936173e6b74fa5f18c6344ba8d5dc4c63910add1dcbe8b9f4122ad68

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