Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca9aa3bb4d56f3f…

MALICIOUS

PDF

124.8 KB Created: 2021-03-24 08:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 6e0d42c622af57a057038ede301ba4fb SHA-1: 9e72faabd1bbe22757c032be3de089e21853b022 SHA-256: 7ca9aa3bb4d56f3f594cf8a20558d1f59ed70fc5b07051a21496f6745c9b3b2f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI that redirects to a suspicious domain, disguised as a search result for educational content. The PDF's structure and embedded links suggest it is part of a link farm designed to funnel users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/wix?keyword=practice+9-7+factoring+special+cases+answers PDF link annotation
    • http://pubgucbayim.com/how_to_refill_epson_xp_200_ink_cartridgejt7lc.pdfIn PDF document text
    • https://dajedenutiwifux.weebly.com/uploads/1/3/4/3/134318988/zewixenuripuk.pdfIn PDF document text
    • https://zegemukugemilut.weebly.com/uploads/1/3/4/7/134707242/bozum-ketoniwi-tekazomadubim-majalumuj.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/viwoto_sosazebezeka_wuwajetikoji.pdfIn PDF document text
    • http://usacreditreport.info/milibiritowuputinojirphvmd.pdfIn PDF document text
    • https://xironudobavus.weebly.com/uploads/1/3/4/4/134461104/9174957.pdfIn PDF document text
    • http://silkhfig.bid/fresh_off_the_boat_meaning_in_tamilxgcp4.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/bca2c399f36b641.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/rojalexipokadaz/ms_word_2007_practical_assignments_for_students.pdfIn PDF document text
    • http://wetovokerug.epizy.com/29377420829.pdfIn PDF document text
    • http://guvivewemubalef.epizy.com/agile_scrum_master_exam_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8fd0f59-1099-4873-ba83-1893637b928b/maths_formulas_for_class_10_state_board.pdfIn PDF document text
    • http://nekodigeteremi.rf.gd/sheet_street_vacancies_in_cape_town.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cef7e8a-027c-457a-ad1c-5126a870513f/what_are_the_sparrows_in_game_of_thrones.pdfIn PDF document text
    • http://zabezotep.epizy.com/61098775495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd19152-5ff2-42ac-bda5-ff0b4fbc2a15/zigetekezinunamomiv.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/mixexegerizokovaragiloked.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/leladezatapujod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa9e969-a63c-48a5-8276-26e8274b182a/new_testament_bible_verses_about_faith.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/reletalejufarovuxujig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9586565-ebd1-47fa-b660-9ce35671fab2/japanese_adverbs_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fad1dc-8b5c-484e-ad80-a848f11f35c1/logo_maker_software_free_download_full_version_windows_10.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_off0001a6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6B8 5544 bytes
SHA-256: 22c80aeb09864e7daefbbeddbf5a2cb34f7fc46666469ddc26119ea7cd5106be
font_01_sfnt_off0001b9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9C8 12344 bytes
SHA-256: 2eea45874381e6ad32a58aa37ed16a6eddaf0cb76cadef4dedcd27c16f91852c