Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfaf788fab9c562…

MALICIOUS

PDF

91.6 KB Created: 2021-09-02 15:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3efce062834c4209c1b6349b9431b4f8 SHA-1: c99c1376deadbed69dd8cc7bdc1276a62f5521a4 SHA-256: 3bfaf788fab9c562c4628e8c4fce8d31cec0471a0a1c516b3bfc8d6ac234896e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics identified the PDF as a link farm pointing to compromised websites, likely intended to host malicious content or facilitate phishing. The embedded URLs and the nature of the heuristics suggest an attempt to redirect the user to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d23814638d---beparagakodaramaxixawufu.pdf In PDF document text
    • https://digireg.cn/upload/mepanabuxozirikipe.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/vozikakudawelog.pdfIn PDF document text
    • http://absigorta.com/E/file/49375787667.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/ruxizukaxogekuro.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/forumuwiresik.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160923a9f2839e---15050223111.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/08/18/wujoweriditemitux.pdfIn PDF document text
    • https://immobilgold.com/file/xuribemilotuledozeboki.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/newomerezimero.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/20080741682.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f9a94fac9---55581287191.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f48a6baec5---81218796907.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/6563775844.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/pqm76k6ljtog34hlsght5h52si/45131214423.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/bba4efec5f91b081c5ef3bf488509064/dozegewisegugoma.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/hds5c00pnl95uggg4c2pe3gdil/66829974923.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/346dbda90ab51a85a3d7fc47841da489/63278366446.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/f990bc998b3d41eb0c8c8929b6f3f5d5/vumalobidujuxitorovukas.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/59f3553ed604db9b5f6dc72c860b9808/lutaxuwokigiwijiba.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/82272184846.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/12763949235.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/tararumipakenonof.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/zowerosipenaruxadomupa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=crushing+it+in+apartments+and+commercial+real+estate+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_off0000fb73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001138a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138A 11200 bytes
SHA-256: cabed1d2550a16d38a6f1cf02b75d02fd6f9a3f439ae0ff8367ce59f36721801
font_02_sfnt_off00012d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D59 19496 bytes
SHA-256: f5dddcef04ec86699f581027c61f73f2bab4e9d64d1ee10d94c3aa411f6cf0ad

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