Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5ffdb6cbe65d86…

MALICIOUS

PDF

62.5 KB Created: 2021-09-25 08:25:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7099dd66017a11fd8e1d38234f8c9d00 SHA-1: b9a69ee89ffddb56367f786127253f618cb0b693 SHA-256: ae5ffdb6cbe65d86938ffb7bb1f27569bd859b72bea3fe1b36fd7addc6d67e0c
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to potentially malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a link farm designed for SEO manipulation or distributing malicious content. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6567

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=how+do+you+read+a+compass+on+your+phone PDF link annotation
    • https://oncallanatomist.org/ckfinder/userfiles/files/jofuxar.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/pezefigerok.pdfIn PDF document text
    • http://www.pratikchoudhury.com/fckimages/file/40914446221.pdfIn PDF document text
    • http://ajej.pretty-match.com/upload/files/7235411527.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/37874774601.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/49525059611.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/fawusixijazevev.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/54208769647.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16134255639ad2---jesolevawisek.pdfIn PDF document text
    • https://stvorki.ru/files/file/goxafimonukamor.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/pavavamowututoduwakax.pdfIn PDF document text
    • http://nelly-design.ru/upload/files/kadas.pdfIn PDF document text
    • http://gustosandvic.com/ckfinder/userfiles/files/70084430597.pdfIn PDF document text
    • https://mkontakt.com/dat/file/xezotuwuvobi.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/hpbab1bjqs17dcsco2rtdor61p/81122562773.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/sijolobutoro.pdfIn PDF document text
    • https://hoavily.com/uploads/files/ziduzijamibusomigidebil.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/liwojuweginim.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/91166648573.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/86938237421.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/dasivonokiba.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/fepuxaxipatozekosobojivin.pdfIn PDF document text
    • http://aleshashop.net/uploaded_files/userfiles/files/91536496993.pdfIn PDF document text
    • https://bestrecycledautoparts.net/images_i/file/talerumuvevog.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF2F 16508 bytes
SHA-256: 5df9bd5c9f997eaccd9333510009bc42811e8f3706030af78b65c61852a083ae
font_01_sfnt_off0000d97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97E 10832 bytes
SHA-256: 339fa5304075a4610af5e6150e898ccab78799247a9b8743b1dfb66b3538774f