Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc220da3622adc1e…

MALICIOUS

PDF

91.5 KB Created: 2021-09-04 11:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b2d93ce2b17eeec0fe49090feeccc6c3 SHA-1: 182d1233f6b6e68734843e45abb75616839c9a07 SHA-256: dc220da3622adc1e4edf23fe7fc1d159b24037863baf692f0fdb6bff483af4e3
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate malicious intent. The document employs a social engineering lure, specifically a 'Browser Install Lure', to trick users into downloading or installing something they believe is necessary to view content. This is a common tactic for phishing or malware delivery, often leading to credential theft or further payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cargotavio.ru/files/file/buramupikopo.pdf In PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/dc72c6287d007a4fe628b7c5d1bc5f64/metezasaliloxinus.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/19368104417.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/7325eee4390b36212108ec40454d142d/rilusexusiginelinevuzoti.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/49597786902.pdfIn PDF document text
    • https://plasy.com/uploads/file/kazivamapo.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/mdfg0pdle6n6t82vk07qd5s8b2/fojorakamol.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/ligumekalewutazizus.pdfIn PDF document text
    • http://strandedtattoo.com/file/zofiwixigijubimoparo.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/josugowala.pdfIn PDF document text
    • http://greenld.com/userfiles/74004891438.pdfIn PDF document text
    • https://dm288.rs/slicice/file/39218910596.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4618128f89---ditijimivufaruvelak.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16070d0c46f864---73278385878.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/751aac778be301411b9acdafa47d2879/biwovelikiwugasizupabu.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/pivopajonu.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/89346534298.pdfIn PDF document text
    • http://df-2.de/images/daten/file/bapiximamotoz.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ecd44cab5---71837527975.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/72508974611.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/dcc48a13423b0cbcb495ffc6c3825ac0/73378593115.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/luvasonox.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/0kijmma3mcc52f5r4qamfovp73/mifaxudazomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=topographic+map+worksheet+answerPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001177d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177D 10916 bytes
SHA-256: 9505d7e3fdebbec63668bfc5cf0ff9e9fdab33b1a1b9944a3663092fc261ee2b
font_02_sfnt_off000130b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B6 18508 bytes
SHA-256: 797aaf4ed995212ab1fcf7604ea754d6b05fb57b838c2f869ff430e103e3a986

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