Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2956267376e47b…

MALICIOUS

PDF

74.8 KB Created: 2021-04-03 04:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 039e22d02a426966e5f4166b3dc8d2a7 SHA-1: ceeae8b5f943ec38f0cb51410fad0a44f0cf8fe1 SHA-256: 8e2956267376e47ba8e0431ba2a704a372ef642bc4bb89e9da671f8f6ae725e6
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 0.9998

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://resalured.ru/wix?keyword=the+little+seagull+handbook+3rd+edition PDF link annotation
    • https://cdn.sqhk.co/bomikiwolug/genVja3/stuntman_game_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/gadowikuxe/oT8gDoP/bopadowatasarinowow.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/alagappan_medicine_latest_edition.pdfIn PDF document text
    • http://kunepuvobimamin.medianewsonline.com/asciidoctor_maven_plugin_images.pdfIn PDF document text
    • http://verifybadgesbusiness.com/28879104032u6hf.pdfIn PDF document text
    • http://muldwych.com/xafipeditazuwant9lc0.pdfIn PDF document text
    • http://polystate.ru/social_media_marketing_analytics_tools52242.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/9ibibhg/63410579143.pdfIn PDF document text
    • http://faceit.su/kohl_s_employee_handbookytldx.pdfIn PDF document text
    • http://workbykoder.xyz/xedikisedazeririkizudirispfffm.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/8640919478.pdfIn PDF document text
    • http://swiss-gear.store/42209462044ux0ye.pdfIn PDF document text
    • http://gratoramm.website/87638769334afacq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://makovetesilo.rf.gd/can_you_additional_apple_watch_faces.pdfIn PDF document text
    • http://suginutowukig.rf.gd/derarufowe.pdfIn PDF document text
    • http://miwexosekapofaj.rf.gd/19608825899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/066ed548-d9a7-4569-9cb8-941207525e7d/how_to_write_one_million_seven_hundred_and_fifty_thousand_in_figures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69694053-ff0f-46c1-900b-9cf12a87dc49/safety_data_sheet_sections_emergency_procedures.pdfIn PDF document text
    • http://xagevudogitoti.epizy.com/managerial_reports_include.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_off0000e4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 5404 bytes
SHA-256: 4b2bd2f4e4b61619beac3c6eb332370cadaa2ffdcdc124b64f78ea74184f2a12
font_01_sfnt_off0000f73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73D 11596 bytes
SHA-256: 880202d9c40ae07ef6cadfeff0f580d73692d82c3c0e9abcc23da4bfb9da5f96

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