Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba30e886eaa55afc…

MALICIOUS

PDF

77.6 KB Created: 2021-06-29 06:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 94c87256c9e8cd0d4da323231e6509b1 SHA-1: a90370770348a43797c5a85d684cc5dd69efbb45 SHA-256: ba30e886eaa55afcdfdea6bc701b8fb087f3cf104077f9212747c873f8e7376d
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=last+day+on+earth+requirements PDF link annotation
    • https://tidurmalam.com/contents//files/72992325359.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/qo1qkjaaql7u6a1ca71bgjrtb1/warefumunor.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/kijoladujoxatixelozisal.pdfIn PDF document text
    • http://serenetransformation.com/clients/870552/File/xafakugig.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947274934b2---53494455459.pdfIn PDF document text
    • https://x-software.cz/data/file/70395395720.pdfIn PDF document text
    • http://rilta.net/userfiles/files/nubezimorenelezipebe.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3afdb52c16---2746013374.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa49ed996da---fidizorubinekifajilasu.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45510978a3---fivokolabevovagutojasod.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/td5i2i8rvnott95bm1uo928vio/50363721858.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720f53be8f3---45882214318.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/lelabowoxupowiwugofu.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7c219ef29b---44615560717.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/niwiwafadelak.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/tapufowapagabokegopoder.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d680ac4e353---sirumutejosi.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16081f9bdc4739---43673833313.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/18467729606.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/57043196368.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/fuwajuzidifigudewa.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/kurarobamiraba.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/400527cf9393d99d31460d2af79ea16f/raroximodafubamop.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b47bb1aebe4---duvunufowiwataj.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_off0000cd4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4E 16668 bytes
SHA-256: 946f16d75f71c7cdbe0fcaae481042c808664900dca46dc2673e1115f547ef8b
font_01_sfnt_off0000f899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B0 10784 bytes
SHA-256: a60a8ea458a0d81e7af5bd8fe3af732be89ac158539e5e55c6e0ff1ff4a49082

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