Malicious PDF — malware analysis report

Static analysis result for SHA-256 298df60857cb29df…

MALICIOUS

PDF

87.2 KB Created: 2021-03-17 12:52:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 571b843421a746fa2e28414aad99d315 SHA-1: 59e7732e382eefda3e2348ab6bd910ec28238b73 SHA-256: 298df60857cb29dfb7f16163f986c299d834cfc53816ebcc05a379cf062ed8fe
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-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://gimoguvi.ru/award?keyword=bsc+it+syllabus+pdf PDF link annotation
    • http://sunobalizumona.iblogger.org/quantitative_aptitude_test_questions_answers.pdfIn PDF document text
    • http://faceit.su/ludo_king_mod_apk_unlimited_six_onlinemvzmk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426823/normal_60199b10ed3a7.pdfIn PDF document text
    • http://helpverifybadges.com/ruzapiforatewafewuzidawyo95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503050/normal_60362cd61340d.pdfIn PDF document text
    • http://daating19.site/texas_cosmetology_written_exam_study_guideltjn1.pdfIn PDF document text
    • http://tophomework.space/ninjas_infinity_2_modpanby.pdfIn PDF document text
    • http://lnstagramcentre.net/webidekasok1qrmd.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/wajufifenoxuj/ponofadijudototufabopike.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/68007578279.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/editable_indian_engagement_invitation_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/896b45d4-781b-45c8-8255-392c3ed7691b/taurus_pt111_g2_review_9mm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f51c401b-a5dc-4471-bea7-18807d15d4ce/mugizapetotuwunogobovopor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae38f0c3-54fa-47b3-b85f-168a9c6a1f12/visateraw.pdfIn PDF document text
    • http://goviragukipi.epizy.com/nordictrack_gx_4.7_manual_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b59b2dc8-d0a0-4ad3-9002-a80449d48d94/23601778404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb8f2d3-6f23-40c4-9a95-c70b9f45bcbe/how_to_lie_with_maps_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a256b0f-4657-4297-ba33-ee5d9cba95f8/51258919991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af87dd92-2cb6-46c8-b8d4-298aa6673dea/koneduzixelakefolupodeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9cfa3ee-e282-492f-b7d2-eedc2da9b773/blank_map_of_washington_state_with_rivers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb0c01b-c377-4ae8-bd8c-97a7732a0150/52927470103.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_off00011601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11601 5344 bytes
SHA-256: d25b1c0bbc3d0c6bda3de60cf6bcbb517b66f7d97f44c3ec767227a2828c04fa
font_01_sfnt_off00012847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12847 11352 bytes
SHA-256: 33a39fc7f0106730e7ae0c6e40a17e87d6ec5101dba042d981eafe5bc956d0b1

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