Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d285d397bd22552…

MALICIOUS

PDF

87.4 KB Created: 2021-09-06 04:26:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4e3c3118652ed2700717b2243bb9400a SHA-1: 0344a61245fde9090882671f40aceb0f67194401 SHA-256: 0d285d397bd22552d47ec08d101b1f04b5d30c95513b07127d07c71cbe46f9bf
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its true intent beyond the link farm heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/lche2q0olpmmtaqd9s3nla3kdd/wavudizafemafawibozez.pdf In PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/de00e19e8925f42648b1c36f69afcad1/lirazamagatiz.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/e5a679e962981030d44ef0d9cef84717/37525956254.pdfIn PDF document text
    • http://cokhiminhhien.com/media/ftp/file/79389806240.pdfIn PDF document text
    • https://immobilgold.com/file/lutozifuk.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb66e6ead3---96307397655.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/kazokixixonagenibasobaf.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161033199cb184---81650056701.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/fadixarol.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a529493f7d5---81826505271.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/56229747925.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/narivinajefawufafil.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/kawaguzes.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/08180170b9f870661704a84d8ff8a48e/74968128929.pdfIn PDF document text
    • http://cosmik-kino.ru/sadm_files/91384764383.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/62777456233.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-6/file/zovaxijumetopomoxubud.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/39019783866.pdfIn PDF document text
    • https://x-software.cz/data/file/mufupiwunegogod.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/kiguwajitexisinaxisizazo.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/8n9n53a7p215fdpvdl7qcqiual/sokopamopa.pdfIn PDF document text
    • https://afayl.com/userfiles/file/27677598838.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/mewot.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a24f21bfc27---641374302.pdfIn PDF document text
    • http://www.miwon.vn/app/webroot/uploads/files/dozidibusuxarifajugesif.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d18c8010bbd---buxajefukakiroj.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/jemigiwaxojadub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=troy+bilt+22+string+trimmer+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_off0000eebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBB 10888 bytes
SHA-256: 27a84a8aa6f030886b68a5327b05aa738639c22a07ecc2e1d39381e027ba1ab9
font_01_sfnt_off00010800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 17996 bytes
SHA-256: 1ab984c0f92a883da782417f542844df9cbdf35d34e69b9e3519d201047a18ba
font_02_sfnt_off000136f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.