Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a2a43c6d5a5675…

MALICIOUS

PDF

54.1 KB Created: 2021-09-12 07:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c7906e451cb1cc7d65a37d0a72a91055 SHA-1: a7e8891708edd367b98630d929948e9c8eaf9982 SHA-256: 62a2a43c6d5a56755f8a180ec9ec81e84b5b2de30adec927148a29f2c40ac62c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and one heuristic identified it as a link farm. While no scripts were extracted, the presence of embedded URIs and the overall structure suggest an attempt to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7372

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://meskerjager.nl/media/files/notamokowigazogefeneledo.pdf In PDF document text
    • http://geobigoni.it/userfiles/files/48158108779.pdfIn PDF document text
    • http://self119.net/upload/userfiles/2021/09/files/210908112620.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/28049790307.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/12633255198.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021090201271370554.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/26175579823.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/nolutafijavifasozawu.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/84544996081.pdfIn PDF document text
    • http://dainindo.com/Uploads/userfiles/files/jatojidebulewowonezugeta.pdfIn PDF document text
    • http://anm-av.de/uploads/files/34723666931.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16137121b27958---dogabazudelex.pdfIn PDF document text
    • https://gilbertems.com/videos/file/74332171061.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/37110067990.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/44460144963.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/dinidukutojafugagow.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/28108409969.pdfIn PDF document text
    • https://protrialse.eu/files/files/50355005202.pdfIn PDF document text
    • http://123flower.doweb.kr/upload/files/24570648539.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/sejex.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/29308109632.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/40c06615585fbb222957aa4e9e33d3e2/14649611424.pdfIn PDF document text
    • http://cmrivestimenti.com/userfiles/files/85340656525.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=youtube+downloader+2021+androidPDF 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_off0000ad7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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