Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4bc1b2fc6ccaa57…

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 12:46:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 98012e146ed7dd32960f8c49e3ff7eea SHA-1: 8ca11ac17ae653c70f4c7fd2d0666df3c7c8c9f6 SHA-256: e4bc1b2fc6ccaa57222999c85bb8cf774b260badffca8551b224ceee019e89c1
126 Risk Score

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 0.9957

Heuristics 5

  • 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.
  • 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://seumenha.ru/wix?keyword=gain+ig+followers+apk PDF link annotation
    • http://apparentlyopt.com/sapijufibosafepikmm2y7.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/cuantos_libros_son_juego_de_tronos.pdfIn PDF document text
    • http://yoptan.space/android_7._0_update_apky5fct.pdfIn PDF document text
    • https://cdn.sqhk.co/nulusezitelo/Hieiigt/nuxixelegewan.pdfIn PDF document text
    • http://nifazafagikoxa.medianewsonline.com/36685291553.pdfIn PDF document text
    • http://honey-love.ru/pltw_engineering_answer_keyspxwvo.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/lotevegemixigizux.pdfIn PDF document text
    • http://xilibinebosapeg.mywebcommunity.org/valonoremajeden.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/jj7icpH/color_run_silver_games.pdfIn PDF document text
    • https://cdn.sqhk.co/bidekidarub/Zjc94nx/boxing_star_cheat_codes_for_android.pdfIn PDF document text
    • http://felesatediz.medianewsonline.com/best_cordless_stick_vacuum_cleaner_australia_2019.pdfIn PDF document text
    • http://trixy-matrix.space/5516614905tbjz8.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/52789928765.pdfIn PDF document text
    • http://vobajujabu.mywebcommunity.org/bilusujapizemesib.pdfIn PDF document text
    • https://cdn.sqhk.co/vetelojid/Yicghha/zifetajenelade.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/gigchiB/raspberry_jam_cake_pops.pdfIn PDF document text
    • http://dfds.in/zepokemufofituh4ry9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzumigasox.myartsonline.com/57886765424.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbade8be-7b00-41d5-a811-b8a2f4c59f4d/q-see_camera_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/350c6b5e-91ef-42d6-80c6-8a72fe2ae095/tosanadakemaxebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44621f40-84d4-4946-97a0-3857acca1652/are_miele_vacuums_any_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae4938d-796e-4f04-8f00-f9d3ee38861e/how_matter_cycles_and_energy_flows_in_an_ecosystem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a384a8-6b38-4316-84ae-02cb3fbd21dd/walmart_black_friday_online.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/51456104329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d959793-eb3c-4c01-a6fb-3d0322c9d0fb/42682246549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0048f68a-d9b3-439f-bdc7-622c208015dc/sarojokisakot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a533686-5032-4b98-9edd-68f133c357e4/que_es_la_biblia_catlica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2b2d0b-261f-415e-baab-91dd48f85c59/65165054875.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_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 5256 bytes
SHA-256: 02079113318b182c464e25f14f43df8c8f74fb1bd9ad24dba3a8fdd56ab9305c
font_01_sfnt_off0001069f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1069F 11356 bytes
SHA-256: cd074e4816ef5dfa9cb74998914c8706e8141ae10729d540891d1854b057ffdf