Malicious PDF — malware analysis report

Static analysis result for SHA-256 170bd6a1771ff345…

MALICIOUS

PDF

92.9 KB Created: 2021-08-04 03:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 68973a1d0857488474acfcbd1e2eea67 SHA-1: 5286c4211cb4b4d772357b37f7033e0d25faa443 SHA-256: 170bd6a1771ff345b515152972910d3a88cb4b11253bd8c98d13268fc23205b8
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed that the PDF contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites. These links are likely intended to lure users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4815

Heuristics 5

  • 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
  • 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://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a85e5824352---dezivawemasimurofokufuwa.pdf In PDF document text
    • http://metabolit.ru/files/file/1818098288.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a12a2e77b8d---kasamitogogitefope.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b733b81883---pasidudizuzogojerujiniwon.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/lesafakizativu.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/xujegafativamitogemel.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/tikejunazawovugu.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/824a33db49cd398fa85244a3d05821fc/27007303553.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607592a80d42d---80738255656.pdfIn PDF document text
    • http://tuvanluatdanang.com/upload/ck/files/jumaxifitajosorom.pdfIn PDF document text
    • https://broodjedenbosch.nl/ckfinder/userfiles/files/rugexeregojudarivur.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/52229673091.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/30389436274.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bff17c1986d---46775626107.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/40386541189.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/cc89823196f72766698b8729a53dfecb/81098179419.pdfIn PDF document text
    • http://tylerdaynursery.org/clients/8/8e/8ed7c4ff1d995b028c1180c1bccb3f4a/File/metixog.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebac3ab1a0---95890606325.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/42535499614.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/guforelogin.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/799b6eb7603e4658e26e2235a8f1be0c/44565629676.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/gedika.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/2967067e55a173ac5f20d2fe25c44076/wenenanisiputunajinim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=cobra+29+ltd+classic+reviewsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001210f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210F 17672 bytes
SHA-256: d8e176ba9b8ca8c22f1f57945ef5ce97700d237168d0431a52077bfd257aafad
font_01_sfnt_off00014f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F96 10872 bytes
SHA-256: 568fac6ac95ad3b8c9381fdb929a9fc338905541dff8124732d3a4f31d45604d

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