Malicious PDF — malware analysis report

Static analysis result for SHA-256 55ed97fe896118f3…

MALICIOUS

PDF

110.8 KB Created: 2021-04-05 10:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: db7a652906ad441981af98750e8465da SHA-1: 54ca811a39df82bd98e833cefa5ba2e956709231 SHA-256: 55ed97fe896118f3d0dd08f13387832f8fb264684d71a71e637ef97e951d4d8f
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 0.9997

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 http://mapenibo.scienceontheweb.net/letat.pdf In PDF document text
    • http://vazaxagoturogik.iblogger.org/cellular_metabolism_in_infected_cells.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/best_place_to_play_fantasy_football_for_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481275/normal_5fcae7181a92d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_601f1bc09d72c.pdfIn PDF document text
    • http://gixapovunugu.getenjoyment.net/91731827979.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/hedhgDr/big_rig_chrome_shop_coupon.pdfIn PDF document text
    • https://cdn.sqhk.co/luwibajik/Smhjhje/75240713167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417543/normal_5fee9c205d54a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425909/normal_6013f6bab724f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377101/normal_5fc72a79c953c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/Xr6F2PkPTcg/wb?keyword=cub%20scout%20handbook%20ukPDF link annotation
    • http://jisijuvod.myartsonline.com/son_of_dathomir_comic_book.pdfIn PDF document text
    • http://kiwaxujunexozet.epizy.com/39095199205.pdfIn PDF document text
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_f47008ece74b46a395458254ce8213b3.pdf?index=trueIn PDF document text
    • http://robuveg.epizy.com/java_for_android_phone.pdfIn PDF document text
    • http://guwaxilajoxeza.onlinewebshop.net/all_adinkra_symbols_and_their_meanings.pdfIn PDF document text
    • https://997b2cc2-d96d-4654-b184-8a5d7ad473c0.filesusr.com/ugd/b8d08c_84461ccb0c054d4c93acffd6681746da.pdf?index=trueIn PDF document text
    • http://pifetipopazemex.rf.gd/frontline_commando_full_game.pdfIn PDF document text
    • https://298c7861-702e-4dad-8e6b-798164301c36.filesusr.com/ugd/98adb1_34fad58a16824c0c9ea20587cf599997.pdf?index=trueIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/el_alquimista_de_paulo_coelho_libro_completo.pdfIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_7b64a9a4f9074d1d9832898e7e6fdf11.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000173e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173E8 5008 bytes
SHA-256: 391f67ea44e6fcfa1febc59ee3b71baea49e2d91a59badf35bc7459ad9c605c8
font_01_sfnt_off000184e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184E4 12188 bytes
SHA-256: aa8991ae5e8c2162214dea2fd2f54bf9429464c5e35438dc801ecdf47b521f0e

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