Malicious PDF — malware analysis report

Static analysis result for SHA-256 9062f0ecab29237f…

MALICIOUS

PDF

84.8 KB Created: 2021-04-26 07:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 844c82379dcb61bf320f1e48cc313a58 SHA-1: 91296a78dd5b42e04328cb665c08c18db00045d7 SHA-256: 9062f0ecab29237f3e80947aaff4e7cea8180bb48c64ea127884500bb11c426d
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by 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 4

  • 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/strik?utm_term=how+do+i+convert+kindle+books+to+pdf+on+ipad PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413000/normal_5ff299009c7fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377717/normal_60338e0c2cc80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_606ea1035c310.pdfIn PDF document text
    • http://kitukotobov.medianewsonline.com/49283724148.pdfIn PDF document text
    • http://lofomerevudawem.iblogger.org/kuzenogexazabububawojosa.pdfIn PDF document text
    • https://cdn.sqhk.co/tudosiki/vhihe1o/the_unofficial_guide_to_pediatrics.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419425/normal_6055f37939fe8.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/5ccxvhf/zisudize.pdfIn PDF document text
    • http://nikomodemudajo.iblogger.org/codex_alimentarius_haccp.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/ocahi4I/arrow_warning_sign.pdfIn PDF document text
    • https://cdn.sqhk.co/nolovojawek/CqvCihm/soccer_champions_pro_2015_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/kokojisip/ogPhg0i/national_air_hockey_rules.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/how_to_start_internal_audit_of_a_company.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/f9683fe6-2834-45c1-ace6-ba8587d8275e/amc_10_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3337ae1a-80e0-41a5-899f-f9b0ad28df83/john_belton_american_cinema_american_culture_4th_ed._by_mcgraw-hill.pdfIn PDF document text
    • http://likusikukir.epizy.com/75422631152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c8c731-337a-442d-8eaf-261d8c81b636/either_or_soren_kierkegaard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e01f760-e6ae-4866-9b4e-7fa60ef15a0a/el_arte_de_amargarse_la_vida_resumen_por_capitulos.pdfIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_a4c8c27b78d541c8821cecb34484358f.pdf?index=trueIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_0dfbb8e1963d49f8a3613622e738ab9a.pdf?index=trueIn PDF document text
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_63b05f029765482f8aa295beeb028589.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 5468 bytes
SHA-256: 1f172524fc6c4be4411e66f70ad42e30f9b2e31139d355583ed7aff1a420dce6
font_01_sfnt_off0001087d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 11608 bytes
SHA-256: 7b0b99c55ab373b89c543279840731ba6e78965c2e1c7915d7626c3fe9ae87bd
font_02_sfnt_off00013066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13066 16108 bytes
SHA-256: f2cdb932ee13b796740eb614e233a545327b697588f9e663f06ef4c88113e31b

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