Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ac1a0f235ed106…

MALICIOUS

PDF

134.4 KB Created: 2021-03-25 01:48:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5b2ba4b791fad3f14e23cd5c6aeabcd6 SHA-1: be273df4f2830103c8e5b2d22ff15c4b9cfc87bd SHA-256: 45ac1a0f235ed1067b2e13b00830fe2db0b552e9718f1d6fed412aac4a9ac6df
186 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 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 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/award?keyword=catalogo+avon+6+2020+pdf PDF link annotation
    • http://fibakigefejep.66ghz.com/86248897142.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/jGghtNa/29640722202.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/2259620.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/Thewhc7/historic_home_restoration_services.pdfIn PDF document text
    • https://sugokumorol.weebly.com/uploads/1/3/1/4/131437576/xinipizok-jodin.pdfIn PDF document text
    • https://voxomusixexuso.weebly.com/uploads/1/3/4/8/134851372/dixavubojurele.pdfIn PDF document text
    • https://pipilebigomido.weebly.com/uploads/1/3/4/3/134372346/sugilabitoberom.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/iihjroT/58710417938.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/hdjfiiz/93533782019.pdfIn PDF document text
    • https://wujumumokujot.weebly.com/uploads/1/3/4/6/134613036/webojexabix_madegovoveja_bakeva_pemipedat.pdfIn PDF document text
    • http://vizexibidoxi.getenjoyment.net/fawivoteruzawelokifov.pdfIn PDF document text
    • https://cdn.sqhk.co/perokokamosa/YiiHXcI/amazon_music_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/gaR9Chh/birth_certificate_akron_ohio_address.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dotiribene.epizy.com/peronewideranagomaw.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/avengers_movies_in_order.pdfIn PDF document text
    • http://sesitalanewu.rf.gd/different_types_of_discourse_analysis.pdfIn PDF document text
    • http://xogimutidum.epizy.com/lonutilur.pdfIn PDF document text
    • http://lofoxos.epizy.com/30479916344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f771ec-d326-4eed-9b78-741c9c538456/pakewabawefajuzulevutaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e7c9ba-2ba0-45ca-a3fb-f3ad70633681/what_happened_to_kindle_owners_lending_library.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3984e3-7256-4057-9017-4bad79640828/pride_and_prejudice_castle_tour.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_off0001d03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D03F 5328 bytes
SHA-256: df1c87307a4d8d2a78319cbdb8f340ce11ad76ac688d65efaf89ef15e541a545
font_01_sfnt_off0001e281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E281 13536 bytes
SHA-256: 06960aca89d0596b1fae2d6ac1952e6589f57c409f5d2947b757656c7e50e8b6

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