Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c41429ec2ad4862…

MALICIOUS

PDF

131.9 KB Created: 2021-05-02 11:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6a2bb1e85172d9f5cc79da7391817d49 SHA-1: 733229db49eef2f0e2e42419e3c4dc4bd94420b8 SHA-256: 7c41429ec2ad4862b0c9db6fc8191b24353a8a019e0aa71f73baa9abc272cc58
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dafemum.ru/strik?utm_term=black+skin+white+masks+by+frantz+fanon+pdf PDF link annotation
    • https://cdn.sqhk.co/jivazufevi/f7if7C7/2019_can_am_defender_hd5_specs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490266/normal_604a816e9ac14.pdfIn PDF document text
    • http://ginixotojaru.medianewsonline.com/7682091476.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/KFwUOhj/52345717807.pdfIn PDF document text
    • http://igcopyrightverify.com/systems_of_equations_worksheet_8th_gradefwth9.pdfIn PDF document text
    • https://cdn.sqhk.co/sokodajep/ha0jfgf/36755913567.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/Yv1yje3/togonagusaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415544/normal_601024c528c0e.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/frequency_adverbs_exercises_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409000/normal_6024424965d16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_604fd177725c2.pdfIn PDF document text
    • http://politach.com/how_to_get_cracked_minecraft_accountspy70d.pdfIn PDF document text
    • http://bristol-yalta.run/the_secret_2000_movie_watch_online_freelnvct.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/S6QzmRT/photo_lock_screen_premium_apk.pdfIn PDF document text
    • http://xulikugo.iblogger.org/59304200853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459027/normal_604e2d2d37d0e.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/78908982467.pdfIn PDF document text
    • http://labincom-med.ru/the_missing_saison_1_episode_5e3ocx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/add1c1df-a60b-4270-a807-cbdeef135f47/29927373321.pdfIn PDF document text
    • http://gawekavadave.epizy.com/app_store_connect_developer_guide.pdfIn PDF document text
    • http://wupafar.rf.gd/forgotten_realms_campaign_setting_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82730f59-71c1-47e7-a4b0-8f2152a0170a/46032793378.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001aeaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEAA 5892 bytes
SHA-256: eb8283af89d7155d03d80e0bfb6d105a34b7f575e902e4b250068e946f9d6a3b
font_01_sfnt_off0001c2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2B5 12388 bytes
SHA-256: a64926975b7a83b5cf65fcf18e6be7f58acc347a557a8fe74dd54d179e6eba93
font_02_sfnt_off0001ec12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC12 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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