Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dfec99d10e1b576…

MALICIOUS

PDF

82.0 KB Created: 2021-03-23 21:02:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 022b3c657f9dc4f539ae374ffb3c4c7b SHA-1: 30e2abac5456dac8e1937abc30c5fee4ae39f58f SHA-256: 6dfec99d10e1b5765fa31a90f71881d55013fff668a21e6c4902629f0d1888b7
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to exploit users seeking information, leading them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://jumiwimov.ru/strik?utm_term=how+to+drain+husky+60+gallon+air+compressor PDF link annotation
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/tokubonaga_nozorizum_xajebabovepa_zogefuluxi.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/Xgfhbjb/ten_facts_about_spacex.pdfIn PDF document text
    • http://teren.fun/brother_mfc-495cw_setuprhord.pdfIn PDF document text
    • https://kobalogowitat.weebly.com/uploads/1/3/0/7/130776452/vogan_wokaran_kisugufojaw_titinufokepudu.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/prayers_for_the_stolen_essaykxu68.pdfIn PDF document text
    • https://cdn.sqhk.co/kutupejotige/Jghjhgi/92879812938.pdfIn PDF document text
    • http://lnstagram-office.com/jugegotuf90i9.pdfIn PDF document text
    • https://cdn.sqhk.co/noxibogalu/jep7Oo8/70464490589.pdfIn PDF document text
    • https://penusifobituje.weebly.com/uploads/1/3/4/3/134314418/tezudemaros.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/jomusabodafami_zareruwolume_sovugimagasin_vigabe.pdfIn PDF document text
    • https://xebuwonivaxatev.weebly.com/uploads/1/3/2/6/132696015/79e62.pdfIn PDF document text
    • http://exampl1214.com/73466086648tk88h.pdfIn PDF document text
    • https://cdn.sqhk.co/gatezoru/jdLYEjb/performing_arts_high_schools_in_nyc.pdfIn PDF document text
    • http://odemebayisitrafik.com/organic_chem_lab_survival_manual_10th_edition848v1.pdfIn PDF document text
    • http://vuwiwetidajin.mywebcommunity.org/rugarodaropili.pdfIn PDF document text
    • http://ruszaimclub.ru/vocabulary_workshop_grade_4_unit_26k1em.pdfIn PDF document text
    • http://1xbet-registrat.site/ubiquiti_bullet_m2_setup_guidel30e2.pdfIn PDF document text
    • http://henrysavbr.site/how_to_repair_a_ryobi_pressure_washer4qxrv.pdfIn PDF document text
    • http://buytoday.cc/how_much_does_it_cost_to_have_a_car_alarm_installedm4djs.pdfIn PDF document text
    • https://cdn.sqhk.co/fapebenu/zw2Qvji/report_folders_for_sale.pdfIn PDF document text
    • http://modernstyle.pro/nefaxevubijomu5o7py.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/husqvarna_viking_emerald_116_vs_118.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/46280f12-a916-4cee-a21b-39d73e5b0dce/43172292576.pdfIn PDF document text
    • http://bagugexasorip.myartsonline.com/iowa_football_schedule_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c1349ca-0d3b-45c8-a139-361072fa9417/geometry_basics_worksheet_answers_gina_wilson.pdfIn PDF document text
    • http://tarepos.onlinewebshop.net/job_application_letter_for_english_teacher.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_off0000fd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD25 6000 bytes
SHA-256: 06fff9d6855bfb474617528d57799aa68584014ae7daed424202b95af1a9c174
font_01_sfnt_off00011180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11180 11884 bytes
SHA-256: b774fb23e2399a77fee1f1c251ac5d3cd6805d71c7f03cfb72b06a10e0c0b2e0