Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab259deee7fcecf3…

MALICIOUS

PDF

79.4 KB Created: 2021-03-11 23:04:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: edb8568b8f3c1690559eecdbd199d368 SHA-1: 98199857c9024b28fea2c36cb50d5ee94bad3ed4 SHA-256: ab259deee7fcecf32c8e4ae37a60741a3a9e9658726f3b8a5da42cf75548cdb2
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 0.9995

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=religious+tolerance+1450+to+1750+ap+world+history PDF link annotation
    • http://bovewitavivebu.getenjoyment.net/bazuresi.pdfIn PDF document text
    • http://update-win20.online/poulan_pro_42cc_chainsaw_pp4218a1bwia.pdfIn PDF document text
    • http://gitixitevusud.22web.org/how_long_does_it_usually_take_to_write_a_screenplay.pdfIn PDF document text
    • http://sait-ok.ru/debibaqnrm9.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/writing_sample_for_phd_application.pdfIn PDF document text
    • http://fofafowazu.66ghz.com/rusuzikiseji.pdfIn PDF document text
    • http://mignonette.space/times_reporter_all_star_game_2018gytgr.pdfIn PDF document text
    • http://plsale.pro/razupatedafadutawlwzvc.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/lakaxuvavuzabosukifagos.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/8974565307.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/d4Thfv4/57503516371.pdfIn PDF document text
    • https://cdn.sqhk.co/polidupokasu/e1CYxRI/stack_it_peg_game_with_board.pdfIn PDF document text
    • http://bovibuvebus.getenjoyment.net/free_math_worksheets_for_1st_grade_place_value.pdfIn PDF document text
    • http://ag-management.space/troubleshooting_heater_blowing_cold_airvsauq.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/3_letter_airport_codes_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/poxedomeke/Mjdhfjd/turkce_pop_remix_sark_lar_2020_indir.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/4bf754c1-0512-45d0-bffd-0cabee486f69/mogegolutezikamuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df208457-ced8-4e07-a823-a620c2d19e83/are_amana_appliances_made_in_usa.pdfIn PDF document text
    • http://gigapenawer.rf.gd/podesisobu.pdfIn PDF document text
    • http://wudemexa.myartsonline.com/spatial_and_diagrammatic_reasoning.pdfIn PDF document text
    • http://jafojib.rf.gd/19517305353.pdfIn PDF document text
    • http://bisavosimirot.rf.gd/pudalupijabupusikezesoron.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB3 6024 bytes
SHA-256: 57d9ce33e8bb5b816bd96a35e8a09221a963eeaaae6b6c18346e1e4eb6c2fccc
font_01_sfnt_off00010454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10454 1716 bytes
SHA-256: d7ea1fcb56881155405295582d78bbd7a96c40251f9b7d9bd0874708c9c87c0b
font_02_sfnt_off00010cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDD 10160 bytes
SHA-256: 64ecf836e4b67784d04296677845214ced8e89924aa6afe5e71b8e1640816e3c

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