Malicious PDF — malware analysis report

Static analysis result for SHA-256 f081bf981eaa2e9f…

MALICIOUS

PDF

69.2 KB Created: 2021-09-22 15:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 92ceb36534e38b6f5f03a2c32326d246 SHA-1: 93eda63225cf73ee1075e4c21db40eb95c8d421b SHA-256: f081bf981eaa2e9fef03e765e89f548b4591a02748680c1f06d06e6c8b231c80
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it's part of a link farm designed to redirect users to potentially malicious content. The embedded URLs, particularly the one hosted on globalmediaminds.com, are suspicious and likely serve as the initial point of contact for a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6708

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://globalmediaminds.com/uploads/files/ruxunulivotetikikekojez.pdf In PDF document text
    • http://cosmikkino.ru/sadm_files/22389470597.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/kaxaworivon.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/vupiri.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/wopedilixezizubifas.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/61878586728.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/xobexavotarovevunuwipif.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/nodixafikuxemodajizin.pdfIn PDF document text
    • http://tuyothuyluc.vn/webroot/img/files/45872454607.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/11171238086.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/9009016831.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/15745185300.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/41826181408.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/9877215664.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/33489192668.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/14501093261.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/85579256242.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/gusug.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/rosixutaz.pdfIn PDF document text
    • http://avandcie-automation.com/ckfinder/userfiles/files/lolevub.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/romivawipixum.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/gulaganog.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399259457ff---21354376934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=bridge+constructor+full+version+free+downloadPDF 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_off0000e137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE137 18192 bytes
SHA-256: bebf15becf78d4a6fa96baa24b9dd0b96abeee315f1e10a12adfefb098012e54