Malicious PDF — malware analysis report

Static analysis result for SHA-256 0adcf0a9582ae3ae…

MALICIOUS

PDF

97.5 KB Created: 2021-09-07 02:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bd39dfeafa08ec60b1f1591b8ebb341d SHA-1: 56f251a9e45fa6d5b434f4f985e61b841d455923 SHA-256: 0adcf0a9582ae3aeabe5b1f09671457d0fcf63eed7257a363cbb2c9379e74d75
236 Risk Score

Malware Insights

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

The sample was flagged by ML classification and ClamAV as malicious. Heuristics indicate it uses payment redirection lures and browser extension installation lures, common social engineering tactics. The document body is unreadable, but the presence of numerous URLs, some pointing to compromised CMS uploads and disposable hosting, suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself likely contains malicious links or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • 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 http://ip-golubev.ru/ckfinder/userfiles/files/potivakewapinafese.pdf In PDF document text
    • https://riolospettacoli.it/filesUploads/file/58768688975.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0a5ab1bd---73973362018.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/2139216887.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/zemejasajinugulogiri.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/jetebuvogefejov.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/8d8ffcbvr93lbe9heq46jl6jt8/sikukusoxifodid.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b63d2a8ebc9---91683636121.pdfIn PDF document text
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/7qquojc9vu5p4to3jagqpj9408/suzes.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/66da07188b5294b95fa46368866e56bd/danezuvuvudipidugodowaz.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/rekefobux.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/vojevunerijunipugu.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160701575f3f50---pabokukolomog.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/45852647489.pdfIn PDF document text
    • http://duocthientam.com/uploads/ckfinder/files/73691211742.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0c16fd58b4---75200741009.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/ba98194d341a2286fb5ac20afa5c2eb2/votol.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/90305232969.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e28b7b84e---roxesajusajunileme.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/zotenodafagapo.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8a439f6538950395a7f2d8e47722b1c0/12206954970.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=tomtom+go+6000+manualPDF 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_off00011b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B83 17740 bytes
SHA-256: 7e0a1f401fb3e28d47221ab73f0b72cf8d19436bf75dac1eda1d34aedb66ffee
font_01_sfnt_off000148fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16112 10312 bytes
SHA-256: 2fe7c630abd4d7b02c07b0fdae45ae6824d0d8fd0036c4965c9f893d08695d23

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