Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f711a600d0098db…

MALICIOUS

PDF

62.4 KB Created: 2021-09-12 10:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 25ab83e7741dec4fd30f14f87804b775 SHA-1: 378fd9f8ca0a50dc56fc2b6067a2e0b0238e672e SHA-256: 7f711a600d0098dbb81763f93df8141b00498fc4b76fe45385e4778a71b24260
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous external URIs, many of which point to disposable domains or IP addresses, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6042

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://philabc.ru/uplcv?utm_term=android+rooted+device PDF link annotation
    • http://3colorjazz.com/fckeditor/userfiles/image/milabuzenekegisasere.pdfIn PDF document text
    • http://grapes4u.ca/sites/all/sites/grapes4u.ca/files/44413150912.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/94265597384.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/11821313057.pdfIn PDF document text
    • http://lsneotek.com/ckupload/files/3991485089.pdfIn PDF document text
    • https://csp-pub.com/stockages/files/fuvagebil.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/78853422308.pdfIn PDF document text
    • https://casalindasbakery.com/ckfinder/userfiles/files/11094413030.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/wowedegifokipukefej.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/fk88df5htr42kr7ln0dnslu297/lovukewovuriwirataroz.pdfIn PDF document text
    • http://ultrabeauty-ff.ru/userfiles/file/ruxituju.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/pikujakomoxafekotamev.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137554e615da---rofix.pdfIn PDF document text
    • https://efckrakow.pl/userfiles/file/73154111079.pdfIn PDF document text
    • http://studioarclab.eu/userfiles/files/pupezowopur.pdfIn PDF document text
    • https://maisonforville.be/documents/file/bapabobolinovuwakisobon.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/36220743409.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/gojozebusasa.pdfIn PDF document text
    • http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/dinavutal.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/pojoniza.pdfIn PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/37120369540.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20219427257092.pdfIn PDF document text
    • https://laatuwhuisweerstralen.nl/upload/file/28489502923.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210905_135445.pdfPDF link annotation

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