Malicious PDF — malware analysis report

Static analysis result for SHA-256 32340a75ace46f00…

MALICIOUS

PDF

76.6 KB Created: 2021-09-17 15:34:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cd58bd41c6f79f9b6ab23d18ae919681 SHA-1: 086590ff0430d831116973f263ec7c6e550d9fa1 SHA-256: 32340a75ace46f0025142731ba68096b514b75ae5fead09c23390e80e811bb0a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, hosting numerous PDF files on potentially compromised or disposable domains. The primary goal appears to be directing users to malicious websites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/0jvvpb5dpq8sbr5ecm7t71l1a3/xovatidipo.pdf In PDF document text
    • https://aquarell.ro/userfiles/file/sufedirebo.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/xukuxizasusuvunomanekawo.pdfIn PDF document text
    • http://philipwillettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jadamewawigakesag.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133475fa66a8---22976954348.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/vebar.pdfIn PDF document text
    • https://businesslife.com/content/files/10473746892.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/69061029496.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/66422515442.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/gimudubanatagefago.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f130d49ca5---zusuremeribazar.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/47223893033.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/161413c710e32f---tamogemejuxeri.pdfIn PDF document text
    • https://oriontradecom.com/ckfinder/userfiles/files/92839849084.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/60964256443.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/vopukokodenixu.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/zosiwogegabusiporu.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/a61521f2e92487852e8d2fcf18a4ca00/32824316823.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/89578140613.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/86423977781.pdfIn PDF document text
    • https://medpressa.ru/files/file/20847034716.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/ligosudelibavowolinazimin.pdfIn PDF document text
    • http://cuanhomkinhtoanthang.com/media/file/47324638471.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/ritisu.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/fogikapukepozesikofujova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=guitar+hero+androidPDF 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_off0000ca12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA12 16828 bytes
SHA-256: d62c4f753e7638dcd4596ad71519b3e939e88f0b1365b13a1595418d109cd530
font_01_sfnt_off0000f599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF599 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB0 10268 bytes
SHA-256: f803dbc280adb1bd6f892959810f39312fc2182a7ca8edbf55ed2ac0fd76af9c