Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6b6068318787d2…

MALICIOUS

PDF

114.9 KB Created: 2021-08-18 18:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5e6122f7451a91a94875be7f1c606ca1 SHA-1: a134c920a34e0a8c4992f4b6382e9c2b2d49d00b SHA-256: cf6b6068318787d2e4bb6167deaf4ff8b3b80c16d87101a61d0d6ef7d068710c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded URLs and the PDF structure points towards an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160895320076b4---rofalapajifadi.pdf In PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/1afb5e0829fb561f9f0d10aa18f7d0f4/xelopafomosujoz.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99342c36e6---luzeselilelewogo.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/16c09157d6f2e8bc1a2960b7040e229b/tuwerinegudirelojadamonug.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/kejopawaxarabomekirebil.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7ab4d92f67---migizowutufosifurokafexi.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/kuwoxogonikuj.pdfIn PDF document text
    • https://gamasteel.net/userfiles/file/87499573857.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/gujubilevoxadewenebafuf.pdfIn PDF document text
    • http://beijingbeat.com/contents//files/91273035105.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/juroxunavejegotusaramomi.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/nunakoni.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/79946630958.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/dezurafinuxozepaton.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/daxegat.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/30611336191.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/rf4iv1qcf9kkqcf9b7oh9un5um/83893036301.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e74557a18---xewiwigigujajidatonodufo.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/komisolotedodefo.pdfIn PDF document text
    • http://fygl.net/uploads/file/250605213917.pdfIn PDF document text
    • http://qhzs88.com/admin/fckeditor_upfiles/file/2021080900054180554.pdfIn PDF document text
    • https://codecs.ro/images/file/vubadudogajupilivar.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/gotudonafi.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/4e2ee8e1f7dcccf2af7fa82e43f47209/mowes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=tinkerbell+story+pdf+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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D0 29060 bytes
SHA-256: 9b0ce06d0f261208247acdd16bb66203e6c5d57fb0b971a8b45e216be5e84f70
font_01_sfnt_off00015f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F8D 3248 bytes
SHA-256: ae45c4f12ef595b0f455ebffdff06a68173d997341367bd94f4281fee4ee45da
font_02_sfnt_off00016cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000184e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184E3 18104 bytes
SHA-256: ce82e1fdb39d4767dd00317b721d6d48934fc84c38e11475cfdd19820c60c588
font_04_sfnt_off0001a195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A195 10884 bytes
SHA-256: 3cab86dac4e221a3b339e564ae8b652a4f50382131629e1fd86e07f2ea5b627e

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