Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1cf54946acb46ea…

MALICIOUS

PDF

79.9 KB Created: 2021-08-12 23:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c4657ad816486d29e27a15be1cfc5b84 SHA-1: 6d26d44d674cdc531a85a22bcd8264fc61e51bd6 SHA-256: d1cf54946acb46eaf898d08ca5d5fb4c89baca5a905ae6f273b35d90849a8877
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the link farm and the ClamAV detection strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pistant.ru/uplcv?utm_term=michael+buble+you%27ll+never+find+chords PDF link annotation
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/27118975380.pdfIn PDF document text
    • http://ritadas.in/userfiles/file/xekapoxuz.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/wosobenumifebaxedetigora.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/f2d1f2e114b87d4c899a940a764055ff/milem.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/gadajufaluzisolido.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f87dabe23---43871649694.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/8rnb1dkab5aap4lf3cknbalopb/9611549711.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160c4093a92a70---56585642595.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/19543493791.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/josamimafodumozepikodole.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/6364ef6e4f6077047f548236f4001dae/pilotudelomidadu.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/nhqci73k96i7a4lmlfgi6tvgm4/numudufukazuvona.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/wibig.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/20462551527.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/deruvudopumik.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/tasojexanamibefari.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/rajesututufopowetipire.pdfIn PDF document text
    • http://rltclassof1970.com/clients/8/8f/8ff9f19c840b982a6efda18ba8bb483c/File/mebumakatedo.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/42d747b3e5cb13756f9941b948d37e44/36587273938.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/56786791522.pdfIn PDF document text
    • https://yellowstonewildlife.com/xofekekuwu.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/836cku2v1qa49lvn3vgjt3spp3/musonokekoloduxo.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b321d747533---78304681292.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/salakugumola.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_off0000cc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC0D 20348 bytes
SHA-256: 806e109fcf75e7f6a021e10f378a5525ea8b04e331ce6186e70e98bdaacf426e
font_01_sfnt_off00010008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10008 10924 bytes
SHA-256: 6be6c26fe476f81709ba15c676dda21c3dadf63b3d8554adeac46d9970bb0968
font_02_sfnt_off00011958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1