Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8565c60c0d2c89…

MALICIOUS

PDF

80.2 KB Created: 2021-06-12 23:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 717b6c311da16f151ea4cb36b47efa90 SHA-1: 052c44b14e6ce038e42def5bc3dbf2fe28ea313c SHA-256: ba8565c60c0d2c895490368d6ebdcc5bdc810c1baeef163605716a72403bb76d
134 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm designed to obscure the true destination. The presence of a 'download' lure further supports a malicious intent to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=automation+builder+software+free PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea0ba4c-1dec-4718-bff4-bdb6c9a8df14/93888921725.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/remez.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/f/reading_comprehension_strategies_scholastic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abab3f0a-8ee2-4174-b5d7-3681935a749a/nexogu.pdfIn PDF document text
    • http://tuvovazuvezo.pbworks.com/f/sugaxugoviboxid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/968c6fa4-eeba-4529-86d7-f94f70b37759/aviation_maintenance_technician_school_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/838c9424-464a-4346-a05f-5bf70508c4df/will_a_universal_remote_work_on_lg_tv.pdfIn PDF document text
    • http://rasetewi.pbworks.com/w/file/fetch/144980982/rovopokabovawokefetomom.pdfIn PDF document text
    • http://xuwuziz.pbworks.com/f/51608783835.pdfIn PDF document text
    • http://mejigulo.pbworks.com/f/norvel_hayes_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561eab02-b9c4-4bdd-8e4e-f446425a4c91/falubida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ca3546-24d9-4518-b92c-f6c5628c9a2d/what_are_the_5_basic_needs_of_all_living_things.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aab14982-a7d7-4d7b-836a-c1e64e361db9/business_intelligence_report_sample.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/plano_de_leitura_da_bblia_em_1_ano_sbb.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144416736/phantomjs_html_to_command_line.pdfIn PDF document text
    • http://mavawakuto.pbworks.com/w/file/fetch/144783735/how_to_install_minecraft_java_edition_on_android_for_free.pdfIn PDF document text
    • http://febamizilaw.pbworks.com/f/how_can_i_unlock_lenovo_bios_password.pdfIn PDF document text
    • http://zobifel.pbworks.com/w/file/fetch/144917688/dakakefatipirofu.pdfIn PDF document text
    • http://kufavuva.pbworks.com/w/file/fetch/144715950/oyun_indir_club_gta_5_apk.pdfIn PDF document text
    • http://tujelupirobe.pbworks.com/w/file/fetch/144648060/how_to_use_safety_first_baby_ear_thermometer.pdfIn PDF document text
    • http://fedokegawa.pbworks.com/w/file/fetch/145209075/mathematics_a_discrete_introduction_solutions.pdfIn PDF document text
    • http://zipiwume.pbworks.com/w/file/fetch/144921777/23734995640.pdfIn PDF document text
    • http://xifatarege.pbworks.com/w/file/fetch/144689349/how_to_sync_lush_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ece7dc3-48af-40da-9b53-3fb106533027/cognitive_behavioural_therapy_techniques_for_retraining_your_brain.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/harry_potter_and_the_cursed_child_film_adaptation.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_off0000fdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBB 5272 bytes
SHA-256: 218ed9ba0faf73a10639e821ace9a08ea802d230dafe1dc5267bfa89f3f00c9f
font_01_sfnt_off00010f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F98 10384 bytes
SHA-256: a4ac8e4f4b7184344e3867b27dc2349c0f9007e4a459e89ac4ad552ea6270abd