Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea342ac014723531…

MALICIOUS

PDF

76.4 KB Created: 2021-04-12 11:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 64604e4d8c335131aa3712347f1be79a SHA-1: 1c3498584f9679f089f93ed4900a3dc2f685a684 SHA-256: ea342ac01472353125be5059957d27147cad50de19e779ede6797d324ab31be1
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 0.9993

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://gimoguvi.ru/strik?utm_term=navy+seal+trident+on+army+uniform PDF link annotation
    • http://gagimubu.mywebcommunity.org/inkscape_tutorial_jpg_to_svg.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/aja6OMt/2020_election_results_arizona_senate.pdfIn PDF document text
    • https://cdn.sqhk.co/toviranevu/2gcbQgh/kodasexefururexukokamejat.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/evony_the_kings_return_guide2mmru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426550/normal_60411f62156aa.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/cnicHgc/change_color_of_object_in_photoshop_elements.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425916/normal_5fd2a17954b43.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/rational_functions_and_asymptotes.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/rapejowepixusojujupotuvo.pdfIn PDF document text
    • http://paktum.pro/dms_guide_5ehhw0y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476418/normal_5fe6db1f2dbc0.pdfIn PDF document text
    • https://cdn.sqhk.co/xetilibul/fmifvxB/vukajekowimomo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444377/normal_5fe64b4bafc40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_6039d85d394d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491410/normal_5fe1617b0f1a0.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/dggOQMr/rebipivebadejekuxomoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412591/normal_60566156a7711.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://19527f6f-7821-4b33-8e58-d909ab9a203f.filesusr.com/ugd/b18fc6_3320f732db324dd28d6f66163b59a82b.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_1a21863ca7e447b398fa5c9ec753e0cc.pdf?index=trueIn PDF document text
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_2c30d3ffdff14fee918678763f423dd4.pdf?index=trueIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_d3e13d59539d4a3aa800b8b2f6908552.pdf?index=trueIn PDF document text
    • http://judiserod.onlinewebshop.net/bsc_biotechnology_books_for_free_in.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/definition_of_business_research.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABA 5184 bytes
SHA-256: 9a74121830c36fb8c113cb01e37187af2409230db646a150ada14717729bdb31
font_01_sfnt_off0000fc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5D 11780 bytes
SHA-256: 2d423c9eb5cfe5213b5194b8c772ecdb3dc35e3109895d80fc766923e9e305a2

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