Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e32e5414adbf75…

MALICIOUS

PDF

57.2 KB Created: 2021-10-02 03:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8a180e402f2e4720c724b49d9ccf8962 SHA-1: 7a930a64e2ea791e77e577640d4edf60ec5b2be7 SHA-256: 92e32e5414adbf7515be3ad6622d4178ff75ebb52560dfabb0ee6286bb09bfa6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning model indicated a high probability of maliciousness. It functions as a link farm, containing numerous embedded URLs pointing to other PDF files hosted on various domains. This structure is commonly used to distribute phishing content or further malware stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7791

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 http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/16800976665.pdf In PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/cbb2a22b4047ce59abdae2452eedf232/74956731961.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/54419638502.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/72964886256.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/xitefarifefoze.pdfIn PDF document text
    • https://livresdarts.com/ckfinder/userfiles/files/94818104908.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/25282074237.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1632068179.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/76572574971.pdfIn PDF document text
    • http://humanlitech.com/files/files/janezumiturojodotetijiri.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/9319620611.pdfIn PDF document text
    • https://pmapmc.com/userfiles/image/files/likerifezet.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/58786493697.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/tuzunene.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/91307871613.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/jamunabepotozimefojasuse.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/5722071811.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/biduzotibudofageki.pdfIn PDF document text
    • http://etkenkalip.com/files/68370328905.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/zoler.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/wiwureluzojatok.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/pizififa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=android+18+quest+for+the+ballzPDF 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_off0000ac80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC80 16816 bytes
SHA-256: c5eec2eb4a71849db69bdc824c0cb6998306c9fbb721a7c57c69031fdbaf7f46