Malicious PDF — malware analysis report

Static analysis result for SHA-256 037341f8ae965a8d…

MALICIOUS

PDF

58.1 KB Created: 2021-09-20 14:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 32163fc315c07566c7541a2ae344154d SHA-1: 0dd09abfefd5f21bd709e2e41c6e00d15217b04d SHA-256: 037341f8ae965a8d480721cd30b1ee38de9d517caf19b8d811eff57e3fffa85f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier further indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging exploits or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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://inwebjor.ru/uplcv?utm_term=boku+no+hero+academia+heroes+rising+full+movie+download PDF link annotation
    • https://piphoto.tw/uploads/files/202109200107285569.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614495c931053---64855166820.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/ruzaxowerurewe.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/puxojiniwoniwovewowekuz.pdfIn PDF document text
    • http://cwpni.com/userData/ebizro_board/file/41552040245.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/xoloj.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161458af04d4fe---41101309878.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/vadovutafu.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/88d639258974792c105918576f2af939/76723448094.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/jusumiwozalased.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/gunisozuriwonokevodu.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/64986142653.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/fajarabemin.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/37789388075.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/92287366660.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/tekedapakarofis.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/rimonaxivifimil.pdfIn PDF document text
    • https://topupdana.com/contents/files/85883974838.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/84666185227.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/161314c7ea3c1f---25747087522.pdfIn PDF document text
    • http://shinaval.ru/userfiles/file/93433331108.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109061017539487.pdfIn PDF document text
    • https://ghnservizi.com/file/87882127158.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/kulavabupola.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/65358310563.pdfIn PDF document text

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