Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffec22f213e3cc1…

MALICIOUS

PDF

93.2 KB Created: 2021-03-27 10:00:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 714bafa9ce4692d7c65adab6e777cd4f SHA-1: 50f6827a41b2e38603e802d8590dbbd0a8bd6915 SHA-256: dffec22f213e3cc178200de87d3badaaba8c6f182be719d2b63cd06ce40a10a4
126 Risk Score

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 0.9964

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://gimoguvi.ru/wix?keyword=what+makes+up+an+ecosystem+worksheet PDF link annotation
    • https://fitokuzigijot.weebly.com/uploads/1/3/4/6/134681543/cb1b5f4dea5e.pdfIn PDF document text
    • http://usesucre.pro/america_not_the_best_country_movieqnlik.pdfIn PDF document text
    • http://brettlockhart.com/star_wars_galaxy_of_heroes_character_mod_guidehksj8.pdfIn PDF document text
    • http://vedice.ru/12694460620ak8ks.pdfIn PDF document text
    • https://risonozolediwar.weebly.com/uploads/1/3/1/3/131398017/7137a9dc64456.pdfIn PDF document text
    • https://cdn.sqhk.co/gowomawabude/gjIMoqH/7375408003.pdfIn PDF document text
    • https://cdn.sqhk.co/wusoxopejezo/jjKDchc/63187763134.pdfIn PDF document text
    • https://gawajofanobovap.weebly.com/uploads/1/3/5/2/135296378/mowureb.pdfIn PDF document text
    • http://manidat.sportsontheweb.net/iskcon_bhagavad_gita_in_telugu_download.pdfIn PDF document text
    • http://buwubaled.mywebcommunity.org/revelation_14_6_lldm.pdfIn PDF document text
    • http://abreudesigns.com/paladin_5e_spells5cu16.pdfIn PDF document text
    • https://cdn.sqhk.co/junulevi/hicEhih/phone_ringtones_app.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/the_ravenous_pig_brunch_menu.pdfIn PDF document text
    • http://bositozibab.getenjoyment.net/20484869655.pdfIn PDF document text
    • http://becloud.website/42552465021palhk.pdfIn PDF document text
    • https://dipitamadupod.weebly.com/uploads/1/3/4/8/134882687/tifoxewa.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/dtjiugM/vikings_tv_schedule_2020_history_channel.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/vf5Kij1/55133108175.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tibamupebunod.atwebpages.com/91245599241.pdfIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_feb5b6e85f7a4d78b28d15322c844811.pdf?index=trueIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_994418e0f598405bb557a8d9d3429a65.pdf?index=trueIn PDF document text
    • http://guxudapese.epizy.com/13444363375.pdfIn PDF document text
    • http://gagonunanu.epizy.com/kuzurajugidujalajew.pdfIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_d240ab26a93a432ab1f3a9c3675e55ee.pdf?index=trueIn PDF document text
    • http://nejovafejasujob.rf.gd/acs_lab_report_format_example.pdfIn PDF document text
    • http://pasazaxara.rf.gd/50482476905.pdfIn PDF document text
    • http://pikosugurib.rf.gd/33141223192.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_off00012e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E21 5412 bytes
SHA-256: ce12d41a9823b93c6c2eb8b587e6d62f95e4c8ad2e3b27429cc47b653202927c
font_01_sfnt_off0001407b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1407B 11264 bytes
SHA-256: 33a36701cbc6825da6654b47201edf3ec2fc275298f591b92e1f95d5b3576b62

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