Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30e635193bae81a…

MALICIOUS

PDF

73.1 KB Created: 2021-09-10 04:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 266c981bde2ad59761f5b42ceaea33e2 SHA-1: d156e6c73bea69ba48497ec4d09c232b11ed2fbb SHA-256: a30e635193bae81aaa8c495b95d9b9bfdf68ea1913d4c263c91acbe743383e58
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, with one heuristic specifically identifying it as a link farm on disposable hosting. ClamAV detection and ML classification further indicate malicious intent. The presence of PDF_URI and EMBEDDED_URL heuristics suggests the document is designed to redirect users to potentially harmful websites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5042

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=get+app+name+android PDF link annotation
    • http://www.hangmandigital.com/files/file/6675228916.pdfIn PDF document text
    • http://npi-management.org/ressource/site-image/files/26282721093.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/mekipabuxuxobepo.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613010a3a570a---36934430543.pdfIn PDF document text
    • https://lufty.cz/UserFiles/files/23035146205.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/rurufibapiwirovoxulemij.pdfIn PDF document text
    • http://jlsxjy.com/right/UploadFile/file///2021090600163673499.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613361f5a468e---fisefufonifipos.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/maser.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/81450876625.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/difabukukegefez.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/92944301045.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/7115802636.pdfIn PDF document text
    • http://apsencollege.org/test/fckeditor/file/ludigukuv.pdfIn PDF document text
    • http://dreambeauty.kr/upload/fckeditor/file/dimuliranawuvoruze.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/gevesexobebapik.pdfIn PDF document text
    • https://avukat.dnsaktif.net/upload/files/nanetoru.pdfIn PDF document text
    • http://xinshifm.com/userfiles/file/89006800717.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/28023304891.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139199245f2c---vonurixibazudegofomegiw.pdfIn PDF document text
    • https://frisch.ro/files/file/lekozimurifesi.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/kemikexawu.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/86507635370.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/xasatelesodudafo.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/fodepunaj.pdfIn PDF document text
    • https://coherence.cz/userfiles/file/82868067984.pdfIn PDF document text
    • 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_off0000ede6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE6 17508 bytes
SHA-256: 0de89b1fc19df3adf201bd99a0032cf0a8c60980738d95f8f299163107cfd16e

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