Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cea3e0bc59a9f2d…

MALICIOUS

PDF

78.0 KB Created: 2021-03-30 18:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c81b97b2144c6703c661f715a12d03a5 SHA-1: 0aba0815b364e323047a89662eca1342fb3228ad SHA-256: 3cea3e0bc59a9f2da9c444258c747a50d3d50bd669cd68dbc917989f23f3ec0e
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 0.9996

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://seumenha.ru/wix?keyword=sands+of+the+coliseum+3 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4419827/normal_5ff15d32aa600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_60515b6796028.pdfIn PDF document text
    • http://zonokiwuwagupu.getenjoyment.net/master_plan_of_evangelism_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417312/normal_5fef483fe3d99.pdfIn PDF document text
    • https://cdn.sqhk.co/xobitabab/VKijII9/my_success_story_business_game_hacked_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/W0icAgh/flight_combat_simulator_mac.pdfIn PDF document text
    • http://wetebopoxegubu.iblogger.org/is_vampire_diaries_returning_for_season_9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gozenabuzixi.onlinewebshop.net/stihl_sh_86_ce_shredder_vac_blower_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/miroxemupew.pdfIn PDF document text
    • http://zajukefed.epizy.com/524066196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/697a16a2-ca6e-4695-9ecc-82267d511081/codigo_ascii_acento_mayusculas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4ef467-2ab1-49d9-b445-eb239261eaa7/fexexezumu.pdfIn PDF document text
    • http://luvepel.myartsonline.com/26073113672.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/sakomuzuronimazekud.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/significado_de_biforme_e_uniforme.pdfIn PDF document text
    • http://dogiwexor.myartsonline.com/binamolerebivajer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca50a36-3bbb-48a7-8608-3c3218cb3750/5780099229.pdfIn PDF document text
    • http://zinolaj.rf.gd/octahedron_template_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/suveloxuva.pdfIn PDF document text
    • http://dijipola.onlinewebshop.net/36800457677.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/52720849360.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_off0000e3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C2 5316 bytes
SHA-256: bc3f6240c883553792414b37bceee8544fc4cd329daca5cde2dd7c1ebdb111c4
font_01_sfnt_off0000f5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A4 11884 bytes
SHA-256: 1ff8083f9a50648d0487129ca2d36aff32fd08050eaad54e28d40f1302dfb4ee
font_02_sfnt_off00011cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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