Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd2bffc2ecfc8a0…

MALICIOUS

PDF

74.2 KB Created: 2021-02-22 11:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 318ee3df296be70870abbfb5a0540aa0 SHA-1: 57e34a216d24e44307ef76ba8c722be117f0ddba SHA-256: 2dd2bffc2ecfc8a091a057e3cae5d7503152790a958656e112939b0d0fdaaff8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of UTM parameters in some URLs suggests tracking of user clicks, reinforcing the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 4

  • 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
  • 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://jacksth.ru/strik?utm_term=garmin+astro+320+manual+svenska PDF link annotation
    • http://store50off.info/753575965652g20o.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/d2jbMO0/bowmasters_download_for_windows_7.pdfIn PDF document text
    • http://exampl1214.com/75194082856mlv40.pdfIn PDF document text
    • http://hr-insider.com/8252063152256zfb.pdfIn PDF document text
    • http://cetapp.xyz/pisexekuzejosonegifekirlho9q.pdfIn PDF document text
    • http://covid-19online.site/chapters_interactive_stories_unlimited_diamonds_apkfhv7n.pdfIn PDF document text
    • http://taygerr.com/what_are_the_dramatic_conventions2yuy0.pdfIn PDF document text
    • http://look-hotel.com/388732286486ykn.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/gbatemp_noob_guide_wii_u_hackingw7qzx.pdfIn PDF document text
    • http://milanbeach.fun/arduino_esp8266_wifi_shield_datasheetpdbpm.pdfIn PDF document text
    • https://cdn.sqhk.co/nezotelo/jeTgiif/magic_cups_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zadorari/fvCjeha/solitaire_card_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/hfheVC3/switzerland_flag_image.pdfIn PDF document text
    • http://domsale.xyz/marketing_consulting_contract_template_freeq5z3q.pdfIn PDF document text
    • http://copyrighthelpcentral.com/central_mn_breastfeeding_coalitionktoha.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/abp_ananda_bengali_news.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/bodatetakopeperakew.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000108b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B0 5424 bytes
SHA-256: 6b910134d68b52e2a3a353d83508bb21334e5f1221c201860bb92a901b195968