Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f417d661e18074…

MALICIOUS

PDF

68.9 KB Created: 2021-09-18 14:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 57136c3a2f0bcad7b0275721c4cef745 SHA-1: 5775fd30d717299ef8a7113e94de72aa1e6fc606 SHA-256: 29f417d661e18074132d3497dd7a488afeecd0ee132c9bdb485ba6e8bd8fb8a5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, further indicating malicious intent. Although no scripts were directly extracted, the presence of numerous embedded URLs and the heuristic firings strongly suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2639

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://lamorenj.com/userfiles/files/kazilenokij.pdf In PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/85827667456.pdfIn PDF document text
    • http://soupworld.de/upload/file/pumozobedu.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/fariwatoj.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/bizopi.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/zagefirelawuful.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/resodozifimunevuvisuve.pdfIn PDF document text
    • http://sakulchaiplace.com/Uploads/file/58768369719.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/palakanazixaginal.pdfIn PDF document text
    • https://k-newsletter.com/ckupload/files/50623797553.pdfIn PDF document text
    • https://iohrp.org/f_files/files/fanazorojewijoxox.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd0a0a66c7---13796460987.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/321128156.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/49025385646.pdfIn PDF document text
    • https://edarky.net/data/file/jasegomabewubeke.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/bedef5fa0cb181aee6446610e050888b/vadupuvuras.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/gepedukemuranatudebexofon.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16131b0506560a---3789674869.pdfIn PDF document text
    • https://niagarablock.com/application/webroot/userfiles/file/mubezomikidomilibanut.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5169972f547f251172d2e63e4dc9699c/nezepuvotipufojed.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/40581617038.pdfIn PDF document text
    • https://armature.ir/cache/fck_files/file/38619262735.pdfIn PDF document text
    • https://t2sc.me/userfiles/tavapeguno.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614538bb7061e---87037147115.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/bugokowutopumataduvu.pdfIn PDF document text
    • http://guss-ex.de/uploads/fck/file/14394311272.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=call+recording+filePDF 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_off0000db63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 10416 bytes
SHA-256: 3be70d0ea611aee328ff178c18146bea0a6899351a00f3c7ae461494aede02b0