Malicious PDF — malware analysis report

Static analysis result for SHA-256 67366545d5fb22a1…

MALICIOUS

PDF

54.0 KB Created: 2021-09-14 13:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6897ab77e6867249a7ef36c14e164226 SHA-1: c59e332a880549b6d8869ccf4df5f18bfb5cd769 SHA-256: 67366545d5fb22a1dd5751c14a94786aac8628573582240d87da0f29f0e5d890
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The ML classifier also indicated a high probability of maliciousness. The file contains numerous embedded URLs, many of which are part of a link farm designed to redirect users, and one URL specifically mentions 'tiny troopers 2 mod apk unlimited money', suggesting a lure for potentially unwanted software or malware. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7372

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 https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/21089756143.pdf In PDF document text
    • http://changrung.com/ckfinder/userfiles/files/panimurirube.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109041256306423.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/61245600496.pdfIn PDF document text
    • https://hiroyoung.com/data/files/somedivazozinekuzuz.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/gojogawelekiboluzi.pdfIn PDF document text
    • http://markone-tools.com/upload/files/nosagese.pdfIn PDF document text
    • http://tomasmrazek.cz/userfiles/file/2852791020.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/89309426573.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138891f22725---galazadafizolubad.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/zedabefezulixag.pdfIn PDF document text
    • http://wuyioutdoor.com/userfiles/file/80696092935.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134e1d8b2ff5---wevexusotiboseduj.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/momufomefegolezajuvudov.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/46490698185.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/94686569400.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/5408271267.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/wanigijutojutibosamiva.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/79561295102.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/negavofodexewedoza.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///tivulazewole.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/lojilirobovilomugodumubuz.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/90487007112.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=tiny+troopers+2+mod+apk+unlimited+moneyPDF 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_off0000b00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB00B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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