Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4ffb61385e958d…

MALICIOUS

PDF

75.6 KB Created: 2021-04-05 14:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 16ef616b0e642aa90a27abebe3356c42 SHA-1: 2f0e9cf3c473ee829e3379af40d9de757c0fd658 SHA-256: 8e4ffb61385e958d82f82abd7aa6dfb6a8260f1e189a841c38960c77695b244a
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 0.9996

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://fokemale.ru/strik?utm_term=what+are+the+two+fiscal+policy+tools PDF link annotation
    • https://cdn.sqhk.co/rekubapapup/eRvgfC0/watupukaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwobevina/HbkKigo/prison_break_season_1_cast_secret_service.pdfIn PDF document text
    • http://greatmasters.biz/dork_diaries_15_i_love_parispdtfy.pdfIn PDF document text
    • http://bukogibewidigu.iblogger.org/english_language_teaching_approaches_and_methodologies.pdfIn PDF document text
    • http://lnstagram-helping.live/how_to_reset_flip_video_camerais9mt.pdfIn PDF document text
    • http://cardioactiveitalia.site/jarijeladkmne.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/dQicVie/dezugejomewisenazugidenej.pdfIn PDF document text
    • http://metaleagle.ru/tofobajo3qvdd.pdfIn PDF document text
    • http://poposiruta.mywebcommunity.org/kenmore_elite_he3_dryer_heating_element_fuse.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/cuisinart_14_cup_food_processor_black_friday_deals.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/gomewubopulosolipareloves.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xapakiz.rf.gd/the_firm_nas_foxy_brown.pdfIn PDF document text
    • https://bcbc83ff-a82b-4234-bf1d-c69e8cae54d5.filesusr.com/ugd/057c82_b42ba6762d3c4cedba7f0cc20a8dd5d7.pdf?index=trueIn PDF document text
    • https://d0a6b1b1-1773-4622-8b5e-0ab5990a7ed3.filesusr.com/ugd/b90ba1_7abf33aee73241bf88ed337d71207602.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/metformin_500_mg_para_q_sirve.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/rutelodaxepiwufixuge.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/44248943828.pdfIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_b74a365525634ea78fbc86596c893cd1.pdf?index=trueIn PDF document text
    • http://telifujovemevo.atwebpages.com/elemental_impurities_risk_assessment_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/attachment_theory_by_john_bowlby.pdfIn PDF document text
    • https://s3.amazonaws.com/gimufesajo/92768785710.pdfIn PDF document text
    • https://79f67b98-100a-41ac-8a2f-4880133f117e.filesusr.com/ugd/f12c90_82e90e7f63d14220893a9c8331f2a584.pdf?index=trueIn 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_off0000eb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 5312 bytes
SHA-256: 370bbe8117981b47b840bac15360a0627ebdfb2fa8ecb3fc8d7d4d92eeae813e
font_01_sfnt_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 10440 bytes
SHA-256: b660d8470ffbe5cbd3125ad2bf69b10b3588128ac7d720af23d97175ab443676

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