Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ffb524a8ab4f3a…

MALICIOUS

PDF

96.4 KB Created: 2021-03-20 22:25:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3a9699b40a2426421270702b066f3e50 SHA-1: dedf5ebb42100ff3fb5e78e01722647595356d32 SHA-256: d9ffb524a8ab4f3aceaaa66803b8c807d8da4dd66e780aa54be13201bab9aade
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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
  • 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://gimoguvi.ru/strik?utm_term=tom+clancy+jack+ryan+books+in+order+to+read PDF link annotation
    • https://cdn.sqhk.co/lomuwomigez/hhjahan/11059054010.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/aibiggj/72388295079.pdfIn PDF document text
    • http://usacarins.com/night_mother_summary_gradesaverfehf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485576/normal_5fef0a65ad4bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459180/normal_604bad21cf554.pdfIn PDF document text
    • http://genoray.pro/careem_car_booking_app_for_pcc1jfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_60312791c76a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476751/normal_6034996434c46.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/qhdo4RB/blue_moon_brewery_and_restaurant.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485704/normal_5fee90331c90a.pdfIn PDF document text
    • http://kijomino.iblogger.org/bigizupupasebudaxekom.pdfIn PDF document text
    • http://remontnatali.ru/watugubanqjvd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dovabaz.epizy.com/4350042687.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/79084848035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/735170d8-1b63-45b1-9747-1a902ca0daa6/love_story_taylor_swift_chords_ukulele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fedeae72-466a-4986-ba4e-6feef3e961de/cyberpower_cp1500avrlcd_intelligent_lcd_ups_system_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/7788319786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe75b96-c91b-44d2-af32-eb381f29727c/the_book_of_basketball_2.0_amazon.pdfIn PDF document text
    • http://zilaxeputeso.epizy.com/pasomadazaxek.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/paper_flower_templates_free.pdfIn PDF document text
    • http://wesukaxibofawu.epizy.com/call_center_training_conversation_script.pdfIn PDF document text
    • http://zimadiwiv.rf.gd/the_collector_2_trailer_german.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_off00013c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0B 5416 bytes
SHA-256: 3e2dbd9c35dae27252d41dc906a29314f5e1816db785e19fe5227fe8feea3263
font_01_sfnt_off00014e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6A 11108 bytes
SHA-256: 8e579387c2a6fad3a251766a3e9459f62461b640b6724df6fae3ac38fc7e41a4

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