Malicious PDF — malware analysis report

Static analysis result for SHA-256 aac3f1ed0fd0b86e…

MALICIOUS

PDF

131.4 KB Created: 2021-03-20 10:25:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c5509ce3f1560f402b9e807c39b6a2a1 SHA-1: 80343a8d5e27ebd8fbd41d1b96bfe5afb4eb900c SHA-256: aac3f1ed0fd0b86e4635ffd73af2c48b81c379e612840ccd1043b3aa0a6e3bef
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 0.9985

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://ponafet.ru/123?utm_term=chimera+guide+poe PDF link annotation
    • https://cdn.sqhk.co/xeduwukaxusa/ehfhcid/stickman_parkour_game_apk.pdfIn PDF document text
    • http://suwetobolubujub.getenjoyment.net/debipazogiso.pdfIn PDF document text
    • http://bebetadiruj.mywebcommunity.org/80992836356.pdfIn PDF document text
    • http://snegny.com/e-_shopping_project_report1zwjb.pdfIn PDF document text
    • http://vowujebotoza.mywebcommunity.org/3327887396.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/past_simple_and_past_continuous_tense_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/hd1LBhb/real_drift_racing_car_mod_apk.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/base_de_datos_en_excel_ejemplos.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/wuzepepeba.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/Zja1x15/push_and_pop_operations_in_java.pdfIn PDF document text
    • http://jafinipu.scienceontheweb.net/3507375767.pdfIn PDF document text
    • https://cdn.sqhk.co/manizamo/hTjhhjw/35582397996.pdfIn PDF document text
    • http://upgrade4me.com/12426208133ox2un.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_f0a163974c33440dbee592cef41ab0ab.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/6928848101.pdfIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_d757c1c2acdd4360b177cc631bf0e610.pdf?index=trueIn PDF document text
    • http://ladurabazidema.onlinewebshop.net/clasificacion_de_bacterias_aerobias_y_anaerobias.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/whatsapp_for_android_2._3_5_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/13650393486.pdfIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_8fb27e0b41d949feb7c6f43abda0967d.pdf?index=trueIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_cd7b217ab4ac400fa88761b66c695d7c.pdf?index=trueIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_beaf85f0a8e8413bbac861e722622992.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/vubefefanejiledam.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/69285703713.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 67440 bytes
SHA-256: 9e58c2c383a3c7b0da97d938f569adee7191904259646c681e9bc7a917535613
font_01_sfnt_off0001bc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC01 5068 bytes
SHA-256: 126730a6645acc2ee4da1fb88421517cd5870d1a20ddedd30121486c98c09519
font_02_sfnt_off0001cd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD03 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off0001d590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D590 11424 bytes
SHA-256: 9ec7e226ffac6e473a6af9fc1d4489f6c5f5bf1a0ff675db907fdbd5060fec07