Malicious PDF — malware analysis report

Static analysis result for SHA-256 268f49b948e599bd…

MALICIOUS

PDF

81.1 KB Created: 2021-09-05 12:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7ac10d178e54f63c3905ae0e58fbd5ca SHA-1: d4ad96381a7f554fe1b6669bdfd5487578d17e11 SHA-256: 268f49b948e599bd0da85178f6289ecb0c540b89ee07f2f1165f1a43120c3436
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm that points to multiple compromised WordPress sites, likely to obscure the final malicious destination. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107b9c82c75a---83410289363.pdf In PDF document text
    • http://anupbolivia.com/images/files/zulego.pdfIn PDF document text
    • https://belitour.ir/basefile/belitourir/files/patek.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/vazebepuxovoganuwexeti.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/tafar.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c35b25c039c---wonojeres.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/03cfb59feb5fef356a32c50f76d52c41/punejejulafefate.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/a32c26b6e45f8d0f4cb88f70f61135ed/56156778879.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16300668444355.pdfIn PDF document text
    • https://digitaldaya.com/imagenes/file/52652672826.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/e4b12663cd9c12cd9f8ff5d1eeb89b34/mufisadusubodirutigod.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bc59b5993ef---40603176215.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a13938a2df4---9743563852.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8a37b7f21e12bb8fe6b3f74f79be71c4/44562225760.pdfIn PDF document text
    • http://getvisa.ru/images/File/jezebimulu.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16075c35f3b140---90291849380.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/44698451775.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/5976807698.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/f165f870be5040232772aa8d24fb2762/86576971146.pdfIn PDF document text
    • https://premiersuli.hu/files/files/rupogutezemajamaf.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/55636913829.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1db545cf0---zaxolugoli.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/d90e0651ecf4c9d988ea6a9b7dab6c0d/soguromadogufuvi.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a14d1528b---78675785315.pdfIn PDF document text
    • http://bronia.org/userfiles/file/88597726588.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=patent+act+1970+bare+act+pdfPDF 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_off0000da40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA40 10720 bytes
SHA-256: 5771836320aea64a265051be98975762a57d1494cb6f5e05bfa24da4493306df
font_01_sfnt_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 16828 bytes
SHA-256: ab15efe48db95e3a9561fd7dd9ae90d6401196ca542ce1732211a58404f153a2
font_02_sfnt_off00011ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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