Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef6227116d6d6c0…

MALICIOUS

PDF

82.5 KB Created: 2021-02-28 15:46:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: e1f19ea5c9c364bbc29faede144c88af SHA-1: b0374bc39c46fdbc65889514342627644249a0c0 SHA-256: fef6227116d6d6c05af1b9e4d07db19ccc540073be6e3cf70424cb1b1311040e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://mezovuduw.ru/wix?keyword=vudu+apk+fire+tv PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5ff594e75f2a7.pdfIn PDF document text
    • http://salonvarna.com/crazy_taxi_classic_gamerutbl.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/dell_optiplex_9010_cpu_i7.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/jarutexavikodof.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/2351052296.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373261/normal_5fdf46ae86e8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454300/normal_60221be91a2bb.pdfIn PDF document text
    • http://bapefajavijofo.66ghz.com/appvalley_apk_indir_ios.pdfIn PDF document text
    • http://ig-copyrighthelpcenter.com/xagavoradedanunawigetara3vfu9.pdfIn PDF document text
    • http://gejudoxe.mypressonline.com/somewhere_over_the_rainbow_chords_eva_cassidy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401983/normal_5fdeca670ec47.pdfIn PDF document text
    • http://shothard.site/pilirivajekadeteryi.pdfIn PDF document text
    • http://itverys.space/osha_safety_training_videos_spanishgyhft.pdfIn PDF document text
    • http://easy-money-cash.space/cinderella_story_book_read_alongtxybt.pdfIn PDF document text
    • http://fofakowusagafo.22web.org/36553456585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_60333129a8771.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jemileti.atwebpages.com/87732746723.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/cleveland_browns_injury_report_week_9.pdfIn PDF document text
    • http://susugafof.epizy.com/imageview_border_radius_android.pdfIn PDF document text
    • http://kigizeme.epizy.com/anemia_treatment_guidelines_uk.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_off000107df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DF 4912 bytes
SHA-256: dd5c722793b8c8702745ab568d574431e9f077efff9a0c514e948b0b6879d4cc
font_01_sfnt_off000118b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 10704 bytes
SHA-256: 5b8c868ee105aec701142cf0b1f5a0cf2fc8642b0ef94e0122e5859c65c31909

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