Malicious PDF — malware analysis report

Static analysis result for SHA-256 e983f352fe00bf4b…

MALICIOUS

PDF

88.0 KB Created: 2021-09-01 06:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 294ec6e98d43028096c80928165f4ef6 SHA-1: e31db71a30aae6846a42ea46d575810bef6c9eee SHA-256: e983f352fe00bf4bfc04834ed8ac3e2bd07c4adc8bedd40138b3a555e441c1ac
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of urgency lures and download buttons further supports a phishing or malware distribution attempt. ClamAV detection and ML classification confirm its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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
  • 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://chcial.ru/uplcv?utm_term=the+price+is+right+soundboard PDF link annotation
    • http://tencanpowder.com/d/files/xufodaxujujajo.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/060337299278.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/u9q884jklgr2biktccbl771urg/levupuxozedurux.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/vivopezarubepudogox.pdfIn PDF document text
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/29451499469.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/51986506669.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/xugododut.pdfIn PDF document text
    • https://coluer.ir/documents/file/vajafuralo.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/d22a1e083127cfc20dcb51c283e92986/34254178203.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/97689282406.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/91005592906.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/zozixijeloxinaxizipu.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d295218cb3---ledamatidurikebum.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/784a0c745a2b9975a572a8ab4d6c9f76/widexaludokewajapige.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/oecaepinmorv6tv2nignch5eo8/39605518031.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16082e09297ed7---14920560715.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b76fe524db6---gonexisusop.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/99484034422.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/3329635905.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/e600e775e5f4c7689f0405cd20a818dd/42895619463.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/de48b02c103fcdcd6413a975f87fb5ba/14745328429.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/fec307fb778f389d0c228760ae7e33bd/tomusobupivo.pdfIn PDF document text
    • http://greenearthgardens.org/userfiles/xalilekewes.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/nimepakoveninoparinekazal.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/fanemikufelopogaz.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://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_off0000f045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF045 18964 bytes
SHA-256: 0519d423cd39a2a349d8db36849f23bc9371933794be39ab9c8761945f112985
font_01_sfnt_off00012166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12166 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001397d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1397D 10952 bytes
SHA-256: 5da494fddb620be1d5cc69a52fa72f52a82e131c46de0d68d46e6bdf61cb1f38

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