Malicious PDF — malware analysis report

Static analysis result for SHA-256 94da4f4822b1ce55…

MALICIOUS

PDF

77.5 KB Created: 2021-09-22 22:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4ecd4cd8b3415816e8402d3f43e348bd SHA-1: 25c1d9a62248a3f1adc73d1f20e4951e6e1c320b SHA-256: 94da4f4822b1ce558e0c094cd6fadf5b13d0f48ab4df4b276fcfa00f198a24a1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://garglob.ru/uplcv?utm_term=paper+mario+minecraft PDF link annotation
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28318291568.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kopipoleniz.pdfIn PDF document text
    • http://eko-uklid.com/files/file/97587625647.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/girutaxufifupixogidewax.pdfIn PDF document text
    • http://eros-arena.com/eros/userfiles/file/ronusuropiwif.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/dbe1cf05c29e35e9aa86bae011028c31/38669680532.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/bugaxirejafukurebodob.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/gasetesemizirezobeman.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/sovotit.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/t8o2fpg6u6tu44a91vijdbi2ft/99483630752.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/35377626779.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/9827792148.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210903_051310.pdfIn PDF document text
    • http://nasledie-sluck.by/var/upload/file/geruxomifenikaneseb.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/34158256100.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/jopoze.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0bbabecb5---donamamexabavokoroju.pdfIn PDF document text
    • http://kuppersbusch.hu/userfiles/files/41032515170.pdfIn PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/tamirasixojixarotasameda.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a9bdb3fe0---witogubidogebusu.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/dedoseseb.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/30985232442.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/dunixefuwur.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/55579399725.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/91904669100.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/mazavakijoxawosipog.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_off0000cc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7B 10428 bytes
SHA-256: 56bccedcc083b99d1d378d036275d390d913418df063cf0be7bf4891b09e0388
font_01_sfnt_off0000e416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE416 16920 bytes
SHA-256: 2fba20917701343d80f2fcce973a3aec8cfd59875fd5dd276fe491ead865b007
font_02_sfnt_off00010ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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