Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c46d1a79ccec9bb…

MALICIOUS

PDF

75.7 KB Created: 2021-03-09 13:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d9567168646db38f840fcb9416fe9991 SHA-1: 32ec1b2d42d3e87ee4979c9b1a246af9055cb074 SHA-256: 9c46d1a79ccec9bbe26909783d06dcc4fe773f724488dabc5a5badad5f276e68
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 0.9992

Heuristics 5

  • 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
  • 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://xezojetit.ru/strik?utm_term=when+i+was+puerto+rican+symbols PDF link annotation
    • https://cdn.sqhk.co/pugepavofu/ifidCnL/9908951894.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/bphehdL/21st_birthday_decoration_ideas_for_him.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/514a2325b2.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/ibQyYgr/blend_me_photo_editor_for_pc_download.pdfIn PDF document text
    • https://sokirokesavosa.weebly.com/uploads/1/3/4/9/134901907/zimefizupugaf.pdfIn PDF document text
    • https://cdn.sqhk.co/kirorakoxu/Jhdpge7/spider_stickman_hero_online.pdfIn PDF document text
    • https://mebemawadaj.weebly.com/uploads/1/3/5/2/135295691/1415664.pdfIn PDF document text
    • https://tapituxupali.weebly.com/uploads/1/3/1/3/131382330/moliganog_josalidubu_dapov_jenenimu.pdfIn PDF document text
    • http://bogipeborowe.sportsontheweb.net/60643708862.pdfIn PDF document text
    • http://tarekupi.scienceontheweb.net/sufabojobemevon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nogafojomor.onlinewebshop.net/adding_and_subtracting_decimals_worksheets_7th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7edf9033-1ba2-4b94-ae3b-6a1519e604b8/46276166928.pdfIn PDF document text
    • http://pawepeg.atwebpages.com/lord_of_the_flies_study_guide_answers_chapter_3.pdfIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_a4d5fe3d4af44a57807566eb2709bbdb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da620d4f-0b1d-4cd8-a5ff-4a40fae6ca47/a_raisin_in_the_sun_playwright.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/kigezunajirit.pdfIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_5a5a1bd838614fe09316cd6ff28343d5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/580ce60c-fc0e-4f67-ac50-5c0507d14296/how_best_to_answer_tell_me_about_yourself_in_a_job_interview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2a7f74e-8106-4a9b-81d8-b4ccdeeb05ae/12515756548.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/bell_hooks_feminist_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/908aa29a-0cfb-47b8-8cd5-dc286d122ff0/planet_eclipse_etha_2_barrel_thread.pdfIn PDF document text
    • https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_8c13e58129bf45ce9a5e6ffbe7e16d1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dupula/hot_starbucks_drink_secret_menu.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_off0000ea26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA26 5520 bytes
SHA-256: 9db72705fce58278f646e535396a9a082f241cb67032099b619c7f18aff5423c
font_01_sfnt_off0000fcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDC 10580 bytes
SHA-256: c12358ae34e22559f6a79c6d5578748571ac9430f2a7bdebd34d1759a36282fd

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