Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e197325e60f941e…

MALICIOUS

PDF

40.1 KB Created: 2021-06-28 22:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ae0da1d22940b8254e24b5f81495435f SHA-1: 67469598ad64511886a0751284b5b1e00adcf51f SHA-256: 8e197325e60f941e0bb712fa58234aba536ba53cadc3c7de40e081f5ac3318df
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide clickable links. Multiple heuristics indicate the document contains a link farm pointing to compromised CMS upload directories, suggesting an attempt to host malicious files. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a downloader or redirector to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8759

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e2dc3ebc---xofif.pdf In PDF document text
    • http://mywayrtk.info/userfiles/file/32325779346.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/dcc1ee02dbb0b58383555db4f94b495c/50237045195.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7803d3f5a3---63799483737.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16089c36185e1d---47876234787.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/fb7cdb73b5991ae7b5fd46f3ee3bb942/kapoparagukovu.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e91b4a14c---25790233532.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/21423197316.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/sosasavumiturubafezifu.pdfIn PDF document text
    • http://dd-eng.com/files/files/24334651205.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba2da0150e---40788504378.pdfIn PDF document text
    • https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/rg3h70hu9oi4tm2v36mp23rdd4/kebezabuzonitozobed.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/22806277964.pdfIn PDF document text
    • http://kcobafl.org/ckfinder/userfiles/files/zogopuwadukalak.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/30215497706.pdfIn PDF document text
    • https://yuss.it/file/lixaviboboxun.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb53b95c6a0---24472991113.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/41210785709.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/jotoviliredogeniwIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=hibernate+interview+questions+and+answersPDF link annotation

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