Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e97cb5ea2a4929…

MALICIOUS

PDF

42.8 KB Created: 2021-09-25 01:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c393098838855e8038f174521d4715ec SHA-1: 274797a13af55be897f8fa469161980b974f590c SHA-256: 15e97cb5ea2a4929a4c29b65c9200b5b58c3bd602bb3e6e4d63eaeeb19c3b3b7
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing campaigns, and contains numerous links to external sites, some hosted on compromised CMS platforms. ClamAV detection and ML classification further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm suggest it's designed to redirect users to malicious content or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5896

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 42 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 https://jooli.ru/ckfinder/userfiles/files/melure.pdf In PDF document text
    • https://livnica-metalurg.com/images/pages/file/45834091477.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/75425057103.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210910193017198.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef12fe55bb---19218064053.pdfIn PDF document text
    • http://cpviettin.com/upload/files/61365521207.pdfIn PDF document text
    • http://cmi.nfe.go.th/ckfinder/userfiles/files/77741767030.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613113c1bdf8d---65530765243.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210912070650.pdfIn PDF document text
    • http://tongweivietnam.com/ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Filesupload/files/zafajuresoluvivam.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/gebazujukirif.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/xorapixemer.pdfIn PDF document text
    • https://xn--80apefbdm9ah5g.xn--p1ai/userfiles/xovare.pdfIn PDF document text
    • http://domosplast.hu/files/file/monofikatulasubavusowo.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/mutabegusoporetinokuriwo.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/2445956077.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/q8j5lo38kk9ddoble479uqbu5r/xedazugawilap.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/85335970252.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/fomiletizibufajanagovuz.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/32244910678.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ec38fd6f76dfac69fe84c489f48827d3/95497562340.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/79113201667.pdfIn PDF document text
    • https://asken.as/bilder/file/fosafusakanibinetukoli.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/peparifasukisexadegiwime.pdfIn PDF document text
    • https://sunsetlearningcenter.com/userfiles/file/josuzu.pdfIn PDF document text
    • http://tichdiem.surecare.vn/uploads/userfiles/file/savetisonujalivowiwonu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=principles+of+marketing+17th+edition+pdf+freePDF link annotation

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