Malicious PDF — malware analysis report

Static analysis result for SHA-256 6acbaa108aa3ba0b…

MALICIOUS

PDF

84.2 KB Created: 2021-09-02 02:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d063226065f6d7417283ffd71e9c4182 SHA-1: 0591ac701472c75bf17615e1903bc27dc0cd49cf SHA-256: 6acbaa108aa3ba0bf6b6c232c969c495018373c8d0b0c0a0f302373a62c0f745
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c8ec09a0af62e23184a937670b5efe2b/gijedilamifewedov.pdf In PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608687e22fdac---bokusutuzunapuwijero.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608519b77b4a8---34220939322.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcc7238864---79466065358.pdfIn PDF document text
    • http://eichler-kammerer.de/xanazuvelozunodibozegelad.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c82e507128---zelefaluwufebive.pdfIn PDF document text
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/nesewibogiviwiw.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/tixuvewovalo.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///39297741716.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/09a0c712db67fe6b2eebd0e32c0d6f89/difosumu.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/46326929710.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/e0epuisknp3qmkrhv02ju860pi/32131178532.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/jibej.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a69e793a8---66456036975.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/24555779362.pdfIn PDF document text
    • http://eco-versute.com/app/webroot/ckfinder/userfiles/files/8576192988.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/9b85cf1c38c4f71d7988275f2279be9d/basidezufakuz.pdfIn PDF document text
    • https://www.educazionesessuale-scuola.ch/ck/ckfinder/userfiles/files/rasofupadodavasiv.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-24/20210624103642683253.pdfIn PDF document text
    • https://kede.org/userfiles/file/95305289337.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/89d56f5fbaf7221838b968f2ffbaf97a/99861837134.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/39212414724.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/3328f47d91927aedafcfb2c9e78f08b0/mupiboxoziv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=office+2016+home+and+business+isoPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 11224 bytes
SHA-256: 2ee14a986f2fa0ee12f84d5470590ac0dd180a5aeb0a58deda5119ab08fd9c22
font_02_sfnt_off000115d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D1 17292 bytes
SHA-256: c14f5484f7fd3951e0eee355f21d4ec5a1980a7d36df539f1cf1d260c060dd1a

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