Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e95aad03cf9ba03…

MALICIOUS

PDF

76.0 KB Created: 2021-08-22 13:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e89f43c51312d3342b3ed68758c5c86b SHA-1: 3bfb956beda3e009458c5d96b44076e708796a5c SHA-256: 0e95aad03cf9ba031cb0b33f5301495e6c6284b8e8b49111beb1a6effa4b8b16
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that direct users to external sites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to lure users to malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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=grade+6+mathematics+platinum+textbook+pdf PDF link annotation
    • https://e-fasteners.eu/media/file/zunogoluvemepojax.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/8913498595.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/122a656740ebeb5e3396c4d934c1f4b1/tubitesaruz.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095bcf226b62---18248630109.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/1b0fcf75074a7fc0b390154e2f97976f/lazopunedenetijetidije.pdfIn PDF document text
    • http://bio86.fr/userfiles/fichiers/sozubofimamero.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/tumulibubaxitop.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/wozuzedupaporumuruwa.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/tilalopagagulivilen.pdfIn PDF document text
    • https://himalmanpower.com/ckfinder/userfiles/files/reson.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/23967830213.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/79198812243.pdfIn PDF document text
    • http://cristalensi.com/public/File/vuzajuxaburufuwux.pdfIn PDF document text
    • http://candientushinko.com/images/file/57117582968.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/98cf73f584b32abac31a91d78d5d447f/tebulunonupogut.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a69533d1882---13894953898.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f411b01da4---23566143417.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f4072eb35---4195421506.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/wapoginexipogakefi.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/kubavesil.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/54178620894.pdfIn PDF document text
    • https://chambres-lannion.fr/userfiles/file/xifidiwijibagipisokod.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16088337f9bfbb---66410546284.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_off0000c167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC167 11524 bytes
SHA-256: 3e4054f077387f1aac77c4870db6f5545caca619632c77589c53fe6aa678a8ce
font_01_sfnt_off0000dc57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 16488 bytes
SHA-256: b58c6ceb0ee6018c062700acd333e5e6a93af2436745073192e6c30324d5744a

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