Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecf49b78599e165d…

MALICIOUS

PDF

46.9 KB Created: 2021-09-06 09:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f49576716b966c2718daa90826443a3f SHA-1: ff5a9d1b60dfd7589c7c111ae8f2937035baf4d5 SHA-256: ecf49b78599e165d644701ebcc9dbc7b98fc84735237f913d08789d8e4eaf68e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6210

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 http://anhuishangbiao.com/upload_fck/file/2021-7-17/20210717022355593342.pdf In PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/246ac4d2c3455c23fcb6671ddeb32ba6/punevozurosidem.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/wuxafu.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/wepanupofefuvezipoxevim.pdfIn PDF document text
    • http://popmetre.com/news/files/peridarev.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4826095ae0---jefiwujalopobazatiwibida.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/tefitiludafobin.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/81475835508.pdfIn PDF document text
    • http://gdbchurch.com/clients/43262/File/lizagozume.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/zapekiviwigudipi.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec3484749b---luzifegitimufir.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d3fd71613---ditivajupubarodajolasi.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/mininewasulomefelep.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/f1ba6b66bdc76233662b8da0d4ffc95c/79706226908.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2c09b1535---67831610028.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16081bd8935eea---30988163838.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/2sum45s4dd2qlvqild20hvk2ed/xivufakasad.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1e4fe7f68---gexipomevizilogibofazu.pdfIn PDF document text
    • http://yoron.net/up/files/rabifebivuxivavirikopa.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b62de845e9a---30271606144.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/8280061134.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/nokolawepetogojibovil.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/74408224178.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607221fa19247---43590867124.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5f9c0cc2a---35409749653.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610c2786aa152---35897679560.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=uppsc+aps+2013+notification+pdfPDF link annotation

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