Malicious PDF — malware analysis report

Static analysis result for SHA-256 510f3975e2052005…

MALICIOUS

PDF

76.2 KB Created: 2021-09-02 14:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 95a779fc895542bcb754fa82377d3599 SHA-1: 130d5e7630d801b014b89dc724b197fae7b86fd4 SHA-256: 510f3975e2052005e5993c660e1196facd5bbdc0528f990679492cb4cb1ffb9a
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to other PDF files hosted on various domains, some of which appear to be compromised CMS upload directories. The primary purpose seems to be directing users to potentially malicious content through a series of indirect links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6602

Heuristics 5

  • 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
  • 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://chronocertif.com/userfiles/file/86024710650.pdf In PDF document text
    • http://cartopack.com/Images/file/namananop.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/zufigajabe.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/7ibb7tp7t9so20mfhj159cek3a/61612018926.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160708d0d36b1f---46715795143.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/67343803436.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/kuxuzonojoser.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/37572970601.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090af6816cfb---nininiropurojupexoga.pdfIn PDF document text
    • https://menu2uplus.com/images/file/60326157052.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/gawudotepizuj.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6b69986c7---birekoronuxale.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4449e6dec1---saromelerigovonutelefi.pdfIn PDF document text
    • http://metamorfozyayincilik.com/userfiles/file/33052576055.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/lujibuzuvovapijul.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/77076468632.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/30847795652.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/42267435771.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7b3f929b4---75632170880.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/turaz.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/48290069675.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2708adbfb---zumunazolifu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=psicoterapia+gestalt+salama+pdfPDF link annotation
    • 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_off0000d3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C0 10860 bytes
SHA-256: e43fff32ccf2311f692bc2a04acb38985709dedc38cb4697e8c0c24c12696bbf
font_01_sfnt_off0000ecac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 17776 bytes
SHA-256: 09dae84325707885369e91403ec0d8248d7dd2b81c226bcad67f2fc6267d124b
font_02_sfnt_off00011b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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