Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e880f40ad34249…

MALICIOUS

PDF

78.0 KB Created: 2021-09-16 22:34:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f6329989131b7f367cd98cccda118cdb SHA-1: 76444e4766eefd77a2bef7a16e2759df1c67c39b SHA-256: 78e880f40ad34249900496631bbea163bf0d406f7cfc1739c7658e91a08041f0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7373

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://pixomot.ru/uplcv?utm_term=how+to+get+gta+san+andreas+on+android PDF link annotation
    • https://toolsatool.com/userfiles/files/89743039743.pdfIn PDF document text
    • https://dolphinsolutions.net/ckfinder/userfiles/files/womimu.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/86171448956.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/josenudugupev.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/korivefarigaboviduxumele.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/43764485690.pdfIn PDF document text
    • https://tomas-music.com/contents/files/13478541008.pdfIn PDF document text
    • https://australiancaravancentre.com.au/application/third_party/ckfinder/userfiles/files/levevutotowubekevo.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/xaludiniwoxu.pdfIn PDF document text
    • http://sdds.be/userfiles/file/77847974690.pdfIn PDF document text
    • http://bjyhyy.cn/filespath/files/20210912231216.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/ziwaxetumus.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/kegokirevupoxewobapexoz.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/42218997455.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/duxefilawebesepoxas.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/jegatopukatatiw.pdfIn PDF document text
    • http://artepcb.com/upload/files/69916970562.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/28449658974.pdfIn PDF document text
    • https://okinawa4d.com/contents/files/62642713153.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/lisamamaxero.pdfIn PDF document text
    • http://air-separation-supplier.com/d/files/felaletozisukiropijin.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/lirusavefidixumiv.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/81180082008.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_off0001197a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.