Malicious PDF — malware analysis report

Static analysis result for SHA-256 14617df6803a1f85…

MALICIOUS

PDF

53.5 KB Created: 2021-08-06 18:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6de17643d8aa501b3cba95736a3e517e SHA-1: 7dfed4c440892919cb754245f23403e5b8dc11b7 SHA-256: 14617df6803a1f856ca04fdc898c835b626f2c478bb40538edec3a6dc22ac64e
154 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 designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7558

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 https://pistant.ru/uplcv?utm_term=plural+possessive+nouns+lesson+plans PDF link annotation
    • https://kidneystonetreatment.in/userfiles/files/dajawedizubiz.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071529c9d423---49043010836.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608012a32cd94---8096108199.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/nobemabis.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/42183163014.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/325006848.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/tidujewibisanog.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/41553336783.pdfIn PDF document text
    • http://sensi-leszno.pl/userfiles/file/luwumujumevigurolusivit.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/fetavesabiteset.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/tilufigefogibowesenigugus.pdfIn PDF document text
    • http://wearebryants.com/clients/3/3b/3bb22ab34fb8fe691aabc4d0498f9caa/File/76136559502.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/980c36eb248a01e192fdd2d841b68fa8/fawedivadopepenosawinu.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3f975d663---15992389895.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/c4lsc6v4tp9bu1lht6bvn15t5d/96799199695.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/56683793995.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/7e96902e86f4eb3f7ff0ed52bda44dda/fesixiguwetefogifexepig.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/a13aec166a2ab3c7223bfff9137ff71d/30804935635.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/92036878996.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16088535f125d5---kimus.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/9addea1a599675a03b88585952fcf80d/matidefezagazusopopuniwet.pdfIn PDF document text
    • http://shophouse.info/images/files/46904361430.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e13ee91c9e---20479105353.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/zixigesuxagimadopivapip.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/dokibebugoromarelasewi.pdfIn PDF document text

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