Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd871fb860a98e6…

MALICIOUS

PDF

47.5 KB Created: 2021-05-04 10:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8288816c0e8e7873e758caeca9f84707 SHA-1: 64def06beb6cfed0f13dd9beea2e166a853b2596 SHA-256: cbd871fb860a98e6a0f60af1ce43d2d0c568b46398f59d330097a9ce90eb0c4a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and a link farm heuristic suggests the document is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7134

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://midufefew.ru/strik?utm_term=cognitive+behavioural+therapy+for+dummies+workbook+pdf PDF link annotation
    • https://cdn.sqhk.co/xubuzivo/dih5Uhh/totokewaveturonulelowi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425506/normal_6004e84399094.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/lanoxana.pdfIn PDF document text
    • http://fedezin.scienceontheweb.net/alternating_current_jee_notes.pdfIn PDF document text
    • http://matras-24.ru/55049435128g5ch1.pdfIn PDF document text
    • https://cdn.sqhk.co/noxutuvixi/ghhdlBe/gb_whatsapp_app_new_version_7._81.pdfIn PDF document text
    • https://cdn.sqhk.co/gixaxukejamu/YchjFC1/41025248833.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/eidBiiV/fomejeduz.pdfIn PDF document text
    • http://weraka.online/dowefabiwur2zjrz.pdfIn PDF document text
    • http://maxiteguf.medianewsonline.com/77648384963.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://cdn.sqhk.co/ramejolir/suAihS1/beastie_bay_apk_mod_unlimited_medals.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_60505cbc26d1e.pdfIn PDF document text
    • http://hookup681.site/wd_my_cloud_ex4_custom_firmwaremqnsf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457320/normal_5fe73510be879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939f6d88-7084-4c44-b1e9-bd3517793ec9/learning_american_sign_language_2nd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/algebra_ii_1_001_practice_problems_for_dummies.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/samsung_un40h5003afxza_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19c5307-ab1d-484a-844b-594ddfb91528/how_to_draw_puppy_eyes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e42e24ca-8c1a-448d-8583-76023de58f9a/ted_baker_cabin_bag_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f11895-4a91-4565-95d4-f7792af4e28b/36938198103.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/dutesax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3deb8139-e1ca-42b4-8e5a-ff2438b790da/15233037878.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/ti_83_graphing_calculator_emulator_free.pdfIn PDF document text