Malicious PDF — malware analysis report

Static analysis result for SHA-256 70664ce8dc799e54…

MALICIOUS

PDF

62.3 KB Created: 2021-10-19 20:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: b66e00706421735949b501e7836fae1f SHA-1: 6bd5b4bb73a34ef4826b582235764d0d254fa666 SHA-256: 70664ce8dc799e5459aa9d5528ca79c8731128ced2a52e2957dcec8d7aa5c61f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8994

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://huyminhplastic.com/upload/files/lodolipefu.pdf In PDF document text
    • http://raovat.coi.vn/uploads/userfiles/file/lowawagenojenenu.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/62147775159.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/52300814812.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/nimosubusajumabuvifijof.pdfIn PDF document text
    • https://ripedesign.com/app/webroot/files/fckeditor/file/35004580952.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/78694818171.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/sowazanalujafux.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/62555457024.pdfIn PDF document text
    • http://openendrep.com/userfiles/files/72676567743.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/rolojuvuxov.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/17658651240.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/33465018576.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/zufeludodisunakatamitima.pdfIn PDF document text
    • http://bwlpsalisbury.com/uploads/files/gejujegifobidupixob.pdfIn PDF document text
    • https://angkaindaman.com/contents/files/91724672374.pdfIn PDF document text
    • http://clanlogging.com/userfiles/file/77555255805.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/vinetuxitumazamiwudes.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/23743139493.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/kewuvejobubaxovinemi.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/37360202933.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/oscUj7J0Gjw/uplcv?utm_term=how+to+use+a+wbfs+file+on+wiiPDF 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_off0000ce57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE57 10424 bytes
SHA-256: bf45dbf82ff9dca700507ed241e49d92e242ae9ebc6bf748b982a2d504e6496c