Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6986a1050d2199…

MALICIOUS

PDF

72.2 KB Created: 2021-02-28 06:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d9e4a57ac187d813287a288bebfc86bf SHA-1: 059f880d114c23cbc4bc198e70696f81ca806d79 SHA-256: cd6986a1050d2199c38b63212ff0c4ab8a43cd8ffe6e1a71d3dba1c2304603c6
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9759

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vilenefex.ru/award?keyword=world+politics+trend+and+transformation+ninth+edition PDF link annotation
    • https://buwolipirawelas.weebly.com/uploads/1/3/0/8/130874522/91a7e4bf4b5.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/zuzakiforepivewo.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/92788906165.pdfIn PDF document text
    • http://jasazotinalol.mygamesonline.org/rc122_remote_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/niga3gc/slo_mo_camera_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/moturalogupe/hdijaZa/zebenejesarigurodeb.pdfIn PDF document text
    • https://dodemitewiv.weebly.com/uploads/1/3/1/3/131380707/432048.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/rulepopuwiropiwali.pdfIn PDF document text
    • https://cdn.sqhk.co/vikafaselida/ePAMt3t/sururaxomanakopezega.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/7Pijiji/college_graduation_bucket_list.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/panonox_wibujamulutopu_zivadifetafubi_lemumizekedi.pdfIn PDF document text
    • https://cdn.sqhk.co/xokekekav/YdhaCig/2751192230.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/mtd_snow_blower_wont_start.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/too_lazy_or_too_lazy.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/cast_of_movie_its_kind_of_a_funny_story.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://liroporuki.myartsonline.com/how_much_does_fallout_4_dlc_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/auto_tune_free_for_windows_vista.pdfIn 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_off0000f284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF284 5408 bytes
SHA-256: 69ee463ace3f9f6367c0dd37b5d95b19231afc1f8c91f3744a17110f1f758504
font_01_sfnt_off000104ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CA 10384 bytes
SHA-256: 83c3688ee36ab8144d9d3a0742dac97e374c36cbec3dc98644f7fb4bdc66b317

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