Malicious PDF — malware analysis report

Static analysis result for SHA-256 bde2dbb69a66995d…

MALICIOUS

PDF

83.2 KB Created: 2021-04-02 14:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e3dd291a1264ad61b98ff7149656a0e9 SHA-1: 5512b04a0e307aa56fe2820411c9d0d1f406eedf SHA-256: bde2dbb69a66995d18550f85a4e5fa3cf7f00da7445fb78ad357402f61eabc15
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 0.9992

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://leonvi.ru/wix?keyword=high+school+ceramics+syllabus PDF link annotation
    • http://bapupozizevose.22web.org/canada_reporter_company_quality_control_agent.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/the_color_of_magic_audiobook.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426408/normal_5feed6d0e41b4.pdfIn PDF document text
    • http://bozigojinodebux.iblogger.org/nasijoguvifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_6034eebf996be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_5fe9b7bb0e0ec.pdfIn PDF document text
    • http://dolinunuridaku.iblogger.org/how_to_get_a_postcode_in_ireland.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/shdPhhK/mods_prison_escape_maps_for_minecraft_pe.pdfIn PDF document text
    • https://cdn.sqhk.co/komajekolino/kghgf6n/truck_drivers_adventure_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/V9Sjdij/halo_rover_hoverboard.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465136/normal_5fcc07a3c97e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369771/normal_600e62745ff21.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bigagapafobari.rf.gd/51750845925.pdfIn PDF document text
    • http://puwolir.epizy.com/purani_jeans_movie_480p.pdfIn PDF document text
    • http://fawalexigin.epizy.com/how_to_fix_sharp_tv_wont_turn_on.pdfIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_f93a5a0e488948ab86cfb07cf7c5b1b7.pdf?index=trueIn PDF document text
    • http://winibivazizi.rf.gd/84224216066.pdfIn PDF document text
    • https://3df016ad-b40f-424f-9918-b96c60f46212.filesusr.com/ugd/387bfe_a988aaa8e7f24ae982d3a056baa11e98.pdf?index=trueIn PDF document text
    • https://ed4d48c2-14ea-47f5-a89a-b82193587323.filesusr.com/ugd/8ce377_42e9759ca6a543e58bb4fa4e20825db3.pdf?index=trueIn PDF document text
    • http://ligoroxenafof.atwebpages.com/how_long_do_viking_ovens_last.pdfIn PDF document text
    • https://e2a12503-e9f4-4898-9b1e-00959bf5a9c8.filesusr.com/ugd/1f0de7_201510f2644e488d8835570cab8c20f7.pdf?index=trueIn PDF document text
    • http://dagewokoxigu.rf.gd/esl_writing_practice_worksheets_for_adults.pdfIn PDF document text
    • http://vonolukover.epizy.com/godegekejumozajosek.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_off000102c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C9 5416 bytes
SHA-256: dce1e47637eb57b2ced144b873f2219146845a101f4aa2274f3b7a762a3036ab
font_01_sfnt_off0001151a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151A 11812 bytes
SHA-256: aebb143a8f0bce8749030e666a3b2bea9d8c0a43beb43e898b23d0d927bcb71d

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