Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6a782656885261…

MALICIOUS

PDF

102.6 KB Created: 2021-04-20 05:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 748f2612cf67e9e4f2aee80b9e86154d SHA-1: 182dfc3e27d4e725b183da9391ad958993597d00 SHA-256: 2e6a782656885261c86e448f8b5391b250d3783e6f0311c2c4a538a21ca0eca8
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 0.9998

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
  • 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://mezovuduw.ru/strik?utm_term=circulatory+system+using+concept+map PDF link annotation
    • http://xijivedijimidip.mygamesonline.org/konevibarinowa.pdfIn PDF document text
    • http://kayikciakademi.com/argos_pretty_pink_popcorn_maker_instructions8qikz.pdfIn PDF document text
    • http://lazadacostumercenter.com/weather_report_claresholm_alberta5gpbr.pdfIn PDF document text
    • http://kigowamukidiba.iblogger.org/21305447190.pdfIn PDF document text
    • http://216tilford.com/what_is_navientdwfcw.pdfIn PDF document text
    • http://cetakchantek.com/teduwinizufotzrsty.pdfIn PDF document text
    • http://igcopyrightclient.com/o_que__titulo_prenotadoqy7q7.pdfIn PDF document text
    • http://menbp.online/pawusepelusuxilipazaworoxkq534.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xotomisen/endocrine_society_guidelines_thyroid_disease_in_pregnancy.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_c3bd5218da0c4995a74ab8bb2f6351db.pdf?index=trueIn PDF document text
    • http://bonizigajivoxi.epizy.com/formal_letter_addressing_multiple_recipients.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_d6fdbc3e02b140bfbb311231715085bd.pdf?index=trueIn PDF document text
    • https://55afd15b-9a96-48ff-beb6-d705f4765584.filesusr.com/ugd/8b06a9_499320c0cbfb4694b3305a832c4ec617.pdf?index=trueIn PDF document text
    • http://vigiwadovu.epizy.com/past_simple_passive_exercises_with_answers.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_d68df03c99314c2eb3e74351216e50e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xidazeze/el_simbolo_perdido_dan_brown_pelicula_completa.pdfIn PDF document text
    • http://rivetibixonapaz.myartsonline.com/the_adventures_of_tom_sawyer_planet.pdfIn PDF document text
    • http://mawidinivetobi.myartsonline.com/49756264721.pdfIn PDF document text
    • http://suzokude.epizy.com/65072226279.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_off00014534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14534 5260 bytes
SHA-256: 9e500e1a917b6e07304758f9056ff990a4303cbb3f06a12bcf53be2b680b13d9
font_01_sfnt_off00015709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15709 11876 bytes
SHA-256: 0c1d3fbb79ad4f81d503365b67c32dbe4ec64c8794881e4c81f8ea8c2a22ee0e
font_02_sfnt_off00017eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EEF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378