Malicious PDF — malware analysis report

Static analysis result for SHA-256 660f8e77017a3881…

MALICIOUS

PDF

80.0 KB Created: 2021-04-01 19:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8bb174a46fd659042c3d2c6307d2c877 SHA-1: 57b10c52875cba0dc66f4b02c0bc269f3d853fec SHA-256: 660f8e77017a388170f0a00db3a298ca0cd29b55238dde3a02ddd6e88b8e6141
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/award?keyword=burda+patterns+pdf+download PDF link annotation
    • https://cdn.sqhk.co/rotazokufaj/FajhgfZ/isosceles_acute_triangle_act_with_act_answer.pdfIn PDF document text
    • http://nevezewikuzi.iblogger.org/darwin_origin_of_species_sparknotes.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/hiahbii/96501030000.pdfIn PDF document text
    • https://cdn.sqhk.co/pojuwudedi/hclDhia/58227855461.pdfIn PDF document text
    • https://cdn.sqhk.co/foguwugafu/jffjjV4/building_design_picture_free.pdfIn PDF document text
    • http://kuliwajijet.22web.org/audit_report_format_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/mujowofapubi/ihijc0z/pc_games_release_january_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fusunejevawu/h4uNlT6/real_basketball_games_download_apk.pdfIn PDF document text
    • http://blockhcain.host/62371143433sbna4.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/WUhbzlO/the_sims_freeplay_quests_2019.pdfIn PDF document text
    • http://bioforcecolumbia.site/high_density_foam_sheets_home_depot1p3z1.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/zemigiduwagafu/usmc_drill_manager_website.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cc4bb61-731c-4352-bb69-815c02655e83/rinnai_r53_tankless_water_heater_specs.pdfIn PDF document text
    • http://dimonejoxu.rf.gd/principles_of_effective_business_communication.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/baptism_certificate_template_church_of_england.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4906b51e-6db0-4084-ac62-170cc81e5a67/20679216534.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/bogewapodaroko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2d87be8-46c0-4786-acb9-2a2d00f35c0c/how_to_fix_a_dripping_kohler_faucet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/895dd995-a258-41be-bd73-10420abb6786/how_do_you_bypass_the_lid_lock_on_a_washing_machine.pdfIn PDF document text
    • http://gefuxexo.epizy.com/best_cheating_apps_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 5176 bytes
SHA-256: 7311811784276c43d14b833e1587e33b027dd1da1a80d5559ede7049ded46c9f
font_01_sfnt_off00010321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 1796 bytes
SHA-256: c9c850e9c351ce199d5e9d1c42a783cd39d33267a74ccb43d8a2fed304f07254
font_02_sfnt_off00010bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAC 10920 bytes
SHA-256: c8437b989a2f6f60adf810cb94c620c4ee73cf64659ab9845a80f36c103de315

Open this report in the interactive analyzer, or submit your own file for analysis.