Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba716097bea9945…

MALICIOUS

PDF

52.0 KB Created: 2021-09-13 02:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 51376d33aaf3ea6870b53db27ad219c5 SHA-1: d3fc1d4bff10732a25420fdc2e6dc1e559fb60a6 SHA-256: aba716097bea99456d423130328b7ff7a65ae97e9bc42598d1d16be48c7130a8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5970

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=how+to+use+an+otg+cable PDF link annotation
    • http://terezszilvia.com/images/uploaded/file/fevuzatakabolobenikitud.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/74079519137.pdfIn PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/18826686948.pdfIn PDF document text
    • http://rsentco.com/upload/file/48913753595.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff8a130193---75608565701.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4a3759623---53302835607.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/83780593145.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/nobuxelaxi.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613034ba01167---24950834409.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/xelax.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/42894768145.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/77238990256.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/laroritonejumut.pdfIn PDF document text
    • http://chinawin-consult.com/userfiles/69313604264.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/89073278746.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/97vlkdkphrbobl74njme7k1esj/49939878490.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/webikejazakagazif.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/16568963004.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/31054511529.pdfIn PDF document text
    • http://jyotiacademicpress.org/uploads/file/13647142782.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/98063065113.pdfIn PDF document text
    • http://kolbiko.com/images/uploads/file/12496971930.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37225558487.pdfIn PDF document text
    • http://agppi99.pretty-match.com/upload/files/60980545848.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/046263d3a26d7c5b3974780c89c3833e/62271793644.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/99771851491.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/lavevasipatafulodulu.pdfIn PDF document text

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