Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d8cc58f27217fb…

MALICIOUS

PDF

41.4 KB Created: 2021-03-25 04:12:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0081275a30d57f5b45979a118cd4aa51 SHA-1: c3d0191eca64e0cfd101bb7cc17a7048f8b9392b SHA-256: c2d8cc58f27217fbc15067f109e53a78149dd398643c810bf07a36fb19aee79a
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution 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, routes users through malicious redirector infrastructure and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8858

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://yafferge.ru/aws?utm_term=dunkin+donuts+whole+grain+bagel+nutrition+facts In PDF document text
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • http://esclub.pro/web_design_with_html_css_javascript_and_jquery_set_by_jon_duckettg8kw3.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/8OIxxWs/bubble_bobble_game_list.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/jcdVhb5/xaronu.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/itjghjF/balenciaga_bum_bag_mens.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/fl2jahj/66769767709.pdfIn PDF document text
    • http://presalle.xyz/how_often_can_you_day_trade_on_robinhoodj2s90.pdfIn PDF document text
    • https://cdn.sqhk.co/dedikunakudu/ih5jhCE/bupoxebuxegepuvisififon.pdfIn PDF document text
    • http://ninureluxoxanu.22web.org/78137276326.pdfIn PDF document text
    • https://cdn.sqhk.co/lewiwifo/idMhfcX/50837060419.pdfIn PDF document text
    • https://cdn.sqhk.co/jufenakajo/i8YOwqn/mandy_moore_when_i_wasn_t_watching.pdfIn PDF document text
    • http://eu-study.ru/wigenximah.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/PihjeJG/free_robux_app_download_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/ribenezoga.pdfIn PDF document text
    • http://kimafixenij.epizy.com/vcf_format_address.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/kapugezusaresarifuji.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/81327892255.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/assiduous_crossword_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/15270704292.pdfIn PDF document text
    • http://luzawuwu.epizy.com/12316439248.pdfIn PDF document text
    • http://gelidug.epizy.com/basic_keto_diet_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/fourier_transform_infrared_spectroscopy_working_principle.pdfIn PDF document text

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