Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b87ed067633e576…

MALICIOUS

PDF

76.8 KB Created: 2021-04-05 08:14:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ad8060e3f6e2fc1e0da19a4e5290bc20 SHA-1: 8564aa9035c0a9b72fcf97bba52c8ef21419d425 SHA-256: 9b87ed067633e57654d5cc88d872310ac5cbd7cc5c0c610c6a5a1357701c199b
134 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://jottigo.ru/award?keyword=options+hedging+strategies+pdf PDF link annotation
    • https://cdn.sqhk.co/tiwumixe/1Vr4jgU/tuvunine.pdfIn PDF document text
    • http://legko.travel/best_100_message_ringtones_for_androidqeygd.pdfIn PDF document text
    • http://genoray.pro/tiranumumeqky2q.pdfIn PDF document text
    • https://cdn.sqhk.co/gasariba/hhcTYjg/60198046531.pdfIn PDF document text
    • https://cdn.sqhk.co/norumuwapa/NhbGVG1/94868232097.pdfIn PDF document text
    • https://cdn.sqhk.co/waxoxewanuvi/fhgdtPf/verizon_content_transfer_iphone_to_iphone.pdfIn PDF document text
    • http://opt15.ru/toyota_camry_trd_price_australiavkx7r.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/g4jangh/dinejipafekomojumosofovuf.pdfIn PDF document text
    • http://eu-study.ru/rajapuvajuu6wk4.pdfIn PDF document text
    • http://creditreportfast.info/do_you_need_coding_for_cyber_security7i8s2.pdfIn PDF document text
    • http://geesecam.com/cyberpunk_2020_character_sheet_appon6mp.pdfIn PDF document text
    • http://mini-camera-super.club/anestesia_regional_y_anticoagulacion6dz15.pdfIn PDF document text
    • http://pitushok.fun/1249113644wehzo.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/CBzRJjj/4831920716.pdfIn PDF document text
    • http://yoga-fitness.space/bixivuwesinekakesawukj1k.pdfIn PDF document text
    • http://raifaisentapp.online/vogogupusukmokl2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dd804c8-42a8-47ae-aa18-a0e7d3c3c974/povot.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/char_broil_gas_grill_2_burner_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cf01d44-f1b5-459f-9ae4-a5d500bd188b/38742947540.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/8200103936.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/runeloluzawesu.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/77762018039.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/adding_and_subtracting_monomials_worksheet_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081e9c4b-42fd-4cca-863a-34ed81944075/86590772011.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA72 5300 bytes
SHA-256: 8722e3499306be325a59a8680e2d6095f917afa24f649efb370344815cba89d7
font_01_sfnt_off0000fc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6C 11712 bytes
SHA-256: 3e403671c0e6a05c9e9d5141651bf11b53cc798f1346b47fe070ac76642a66f5

Open this report in the interactive analyzer, or submit your own file for analysis.