Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d098fa43bf96805…

MALICIOUS

PDF

75.9 KB Created: 2021-03-31 13:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 03339879eee4b9a0968d1b46bb74158a SHA-1: 5780f77776f0cece70e9cf8480c8cce2efe35c7f SHA-256: 7d098fa43bf968057d302e9829806a2b337a485bfdb0fe7968ac574d084ba4ac
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-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://xajibur.ru/wix?keyword=shelley+lake+trail PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480905/normal_5fda85a456d13.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/series_of_unfortunate_events_books_how_many.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_605c08827ec2b.pdfIn PDF document text
    • http://walletelectrum.buzz/blue_red_balloons_clip_artwlr6v.pdfIn PDF document text
    • http://uspeh.icu/how_does_dbt_therapy_works9cqj.pdfIn PDF document text
    • http://alifan.store/how_human_beings_depend_on_environmentv2zil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410217/normal_6002a7d510fbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_601b4c0d909b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://giworutiw.myartsonline.com/15776342344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ebc588-abc8-4ac9-b6c4-1a53d5a84025/how_to_fix_dish_network_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/65583554532.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/67086883352.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/67355473821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c13e89b-e93c-4086-bf29-1af2b64629ee/komegix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/010e0984-a2f7-43e6-9f28-ba9ad1036f40/how_to_teach_the_sense_of_touch_to_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/download_film_fifty_shades_darker_sub_indo_lk21.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f17c43-1ad1-47f2-bfb5-4ac0595d5eed/walikoxemuwexuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19ab8a0d-f765-4837-a7e7-6c7e08f025d7/82564321790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75a5f1db-7038-40a6-99b4-8eb34c1234c1/78246577245.pdfIn PDF document text
    • http://furunes.onlinewebshop.net/scosche_fm_transmitter_stopped_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8c2010e-db33-4159-aa84-6e2c09c6b607/what_is_the_theme_of_in_another_country.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/juwuwipo.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_off0000ed6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6E 4864 bytes
SHA-256: 788d9bb2a3bff5b1487c6ffd286c9feba75a46cc1058fe8fb5862f85221f07f6
font_01_sfnt_off0000fdfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFA 10512 bytes
SHA-256: 0400e6cc8f27324ea2a8ebce2d64b31935cac6dca4ddbace009eedbdd9a62df9

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