Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fcd73a71fb0804…

MALICIOUS

PDF

84.5 KB Created: 2021-03-21 04:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d6324c13a2c2d1c6eb6f8f4835e93a08 SHA-1: 218f3adda70d276e98b0b0ca34ecd7d6206aa0e1 SHA-256: 76fcd73a71fb0804273939bff71a83d115c5779cdb420a97523491414eb170c2
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://gimoguvi.ru/wix?keyword=mikandi+hack+apk+download PDF link annotation
    • http://m-ryanaf.site/sugixrk7w8.pdfIn PDF document text
    • http://kimisorunutom.medianewsonline.com/asrb_net_syllabus_2020.pdfIn PDF document text
    • http://leririv.sportsontheweb.net/how_to_charge_ion_tailgater_speaker.pdfIn PDF document text
    • https://mafaredoli.weebly.com/uploads/1/3/2/6/132695491/507bd0990065a.pdfIn PDF document text
    • http://xosubowavenu.mypressonline.com/gadofoku.pdfIn PDF document text
    • http://plsale.pro/thanksgiving_2018_deals_excel_sheetesmd4.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/82667758054.pdfIn PDF document text
    • http://pribor-poverka.site/goguvkru43.pdfIn PDF document text
    • https://faxufoxexukixel.weebly.com/uploads/1/3/4/4/134455740/fitumi_luzadozaw_redilikonij_tamutimexezira.pdfIn PDF document text
    • http://coins24h.com/mejores_frases_del_guardian_entre_el_centenora7yv.pdfIn PDF document text
    • https://sasikeruxet.weebly.com/uploads/1/3/4/8/134851076/8114616.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/siwidumukumakugefisimiz.pdfIn PDF document text
    • http://tuloxixanarurid.22web.org/owl_apa_reference_guide.pdfIn PDF document text
    • https://motabuwupogofe.weebly.com/uploads/1/3/1/6/131607229/wawujagakibubu.pdfIn PDF document text
    • http://eurozone.pro/wuwawuroliputlpnco.pdfIn PDF document text
    • https://xevujudibibabus.weebly.com/uploads/1/3/4/5/134599482/6528090.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soburuwukipo.epizy.com/best_c._v_format.pdfIn PDF document text
    • http://diruben.rf.gd/kijuvugikovasuxunajusaj.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/ppt_agenda_template_free.pdfIn PDF document text
    • http://zoderimile.rf.gd/kinetico_model_60_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/calgary_map.pdfIn PDF document text
    • http://pubometev.rf.gd/stranded_on_a_desert_island_game_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/el_arte_de_amar_pelicula_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87dc2248-39d2-413d-87af-1b72c62d4864/cycleops_mag_trainer_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b6ee94-a09c-4b85-8d81-2a5aff2de963/adobe_creative_suite_download_student.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/758ec63b-1325-4cd0-ae39-ed4953dbaf5f/47496222460.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/93544470567.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85b51b3-6a45-4987-9e9a-6e8712210690/will_star_citizen_be_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A1 4236 bytes
SHA-256: 0953ed9befd8e0194ee7ee23831c67d2c90c44b2b12743a3330bb373eee394c2
font_01_sfnt_off0000f55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55F 5048 bytes
SHA-256: f30d6a9674cfef40da4d9c999a31e49571dbf3cb74d9b518fdf8761066fe6e41
font_02_sfnt_off000106ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 11016 bytes
SHA-256: fe7e6b9996bdfabb859d440aa28bc723d2fab58e313446da49d1a41c43c4d5f1
font_03_sfnt_off00012cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CBD 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd