Malicious PDF — malware analysis report

Static analysis result for SHA-256 c169be01839aaa83…

MALICIOUS

PDF

64.0 KB Created: 2021-09-08 19:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d2cb85a39ec7b1f7ed8672f6e112b861 SHA-1: ad851144024dd55e916454cba5730026b85cf434 SHA-256: c169be01839aaa836bea61acb7b3ce156b23f8065ee7007d6317d705f2af4d31
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. ClamAV detection and ML classification indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7155

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gurukripapublicschool.org/userfiles/file/feravololimewel.pdf In PDF document text
    • http://knshzj.com/CKEdit/upload/files/8487363294.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/68219313943.pdfIn PDF document text
    • http://peknanevesta.sk/media/file/89317526616.pdfIn PDF document text
    • http://intertribo.sk/files/wowapawuwenuj.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/wojifumolir.pdfIn PDF document text
    • http://semihkerpiccilervesupersound.com/upload/file/jezoribuko.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202109081357255535.pdfIn PDF document text
    • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/vejiwedem.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/losovumufofosadasuwofe.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/12548785040.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/79533158368.pdfIn PDF document text
    • http://agilesolutions.in/uploads/78670770718.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/49214151891.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/25661053313.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/vokavexotugexolip.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/5418731155.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/vojevebadelase.pdfIn PDF document text
    • http://efcosmetic.com/uploadfile/files/28874294771.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/kizikinu.pdfIn PDF document text
    • http://safarang.com/basefile/files/xibanis.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/95558641626.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/xinofudatokuporatopuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=body+language+signals+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE548 10744 bytes
SHA-256: f0c508e0c24d7192503d6f6b42a7fb4cd3e47f16038e8afe1dd1d9d55c4313b1

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