Malicious PDF — malware analysis report

Static analysis result for SHA-256 336e29d3eb37db1b…

MALICIOUS

PDF

73.3 KB Created: 2021-07-16 03:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 078f237c0558a51e3595105bf25fb0c6 SHA-1: e7f1c6facf3e1605c3a77936e12d6bf1a51a964f SHA-256: 336e29d3eb37db1b4c4d19978392047ce90480dc4ac4e151c314bd57005fc70d
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve to distribute further malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e010496c191---57483931721.pdf In PDF document text
    • http://alhs1973.com/clients/64426/File/butidofejitikegekawo.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/josirepijakorotuxesilegi.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160975050b7c85---gepugoru.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/77f1c3cd8f48c9d4d782fe7786eb1484/gupibadupivalifegatuv.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/88ee1778060cd5095cb9800f05b58c7e/dutije.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b03f7ad05a---6510041160.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/a1fa2e1143983fcc46f72226e5920781/sabulusugedenu.pdfIn PDF document text
    • http://haki.vn/uploads/files/mejejonozol.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/sogc39h2k8vaivrr8shhttj7i6/28004277876.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606dcfd97dea9---32727901631.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/wizumutofuvefotijax.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/zotiwaji.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/vumetofawizobobebesen.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/makewupomuxasupap.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/g60r4lhqoaec1bvp4sqd36oqos/7199945177.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/xiniwovurejij.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea550dd6f7---zetejafowugiza.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee1f0aca979---28352712005.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/a6af4299d8a14c0217e7483092fbc5d4/33578899510.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbab121ac9---kijuvudoxu.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/fujukimoni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=ever+increasing+faith+smith+wigglesworth+pdf+free+downloadPDF 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_off0000b985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB985 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19C 11200 bytes
SHA-256: 79b1f78ee078d8854b89b081afe7962ed2445ab329e782c90bb59918a49536de
font_02_sfnt_off0000eb7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7D 16240 bytes
SHA-256: bd697f1922a3c7818b884b57db45e90c0c21ece23e4cc436f011f0f979fb1b73

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