Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcdb848a882e75a5…

MALICIOUS

PDF

59.1 KB Created: 2021-09-12 12:19:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b87a6298d2c876981fc97ad331524409 SHA-1: e6ff2afe33b9ac8a7924fbdfc4499fdd01bf12ea SHA-256: dcdb848a882e75a502c908f8f90893347fcd0fd7b37889276e9f4d8d08ae4d7f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised CMS platforms and disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The document body is largely unreadable binary data, but the presence of embedded URLs and the heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://lapawan15.com/shop/fck_file/file/gupavutebenozusarekaxapib.pdf In PDF document text
    • http://metall-press.ru/files/sinigiduvetisubukerun.pdfIn PDF document text
    • https://vhssirimpanam.org/ckfinder/userfiles/files/33167389993.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/tosero.pdfIn PDF document text
    • http://sirmamedia.com/ckfinder/userfiles/files/26227132091.pdfIn PDF document text
    • https://ventsistem-bg.com/userfiles/file/30078013957.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/fekozibadagu.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/fepisowe.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/35339732822.pdfIn PDF document text
    • http://ingore.cn/upload/files/lunaveken.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1c897d4ae---12382572251.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/55138924251.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/4785307121.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/i25gjmukovtebm6kgralkc2l83/pepututefekizujomuwiwito.pdfIn PDF document text
    • http://sb-78.ru/files/file/gibafuloxokerosapeb.pdfIn PDF document text
    • http://heichapuzi.com/uploadfile/file/15950902514.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c1b4a432ec---49239379140.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c5e8f3645---22930747136.pdfIn PDF document text
    • https://salwangurugram.com/files/73437922644.pdfIn PDF document text
    • http://vatlieubaooncachnhiet.com/userfiles/file/sapibeniropogasuwaxadugev.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/3801551515.pdfIn PDF document text
    • https://mmrh.myagenda.cz/pictures/editor/files/zutojuletixu.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/25466300057.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=head+soccer+android+downloadPDF link annotation

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