Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb999d6e4b9b9ff…

MALICIOUS

PDF

84.2 KB Created: 2021-09-21 04:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 29878a74c8e836204871ac30b54b25f4 SHA-1: 12222be29ad34bab2a5b4c2af9617d1bb5f0348c SHA-256: beb999d6e4b9b9ffb6bf2f70bb36389e2980104041d9494954cf5c1bf6c2046e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is structured as a link farm on disposable hosting, suggesting it's part of a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports this, implying a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=cockpit+full+movie+download+filmywap PDF link annotation
    • http://wawabed.pl/uploads/userfiles/file/tuxaterev.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210912_5C8EFD52EDFE3597.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/12774298083.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdc687ccca---torazegazonalama.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/rivuvunurek.pdfIn PDF document text
    • http://vicc.huh.hu/UserFiles/File/73537078452.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/fovamanulexa.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/19521829141.pdfIn PDF document text
    • https://ptogel2.com/contents/files/73264900913.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/21974234996.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/66847355073.pdfIn PDF document text
    • http://wangnatheater.bpi.ac.th/ckfinder/userfiles/files/tamejavubuko.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/36854970472.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/vinonodewegosok.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/28390791158.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/dipozili.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///18205070035.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/kifubarenawufobedesidife.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/5964897176.pdfIn PDF document text
    • http://bilcafe.it/userfiles/file/nomujutumilivevasimatana.pdfIn PDF document text
    • https://theipbuzz.com/images/file/56655987584.pdfIn PDF document text
    • https://photojet.bg/userfiles/file/58666812362.pdfIn PDF document text
    • http://kammed.com/userfiles/file/dasujiniwigozif.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/49895656384.pdfIn PDF document text
    • https://kaptenhoki.net/contents/files/zibutusegavatepidexememe.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613456e68c0c9---vowutuwejumipenisib.pdfIn PDF document text
    • 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_off0000e39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39F 11004 bytes
SHA-256: de19efe3ad17975f2eae80039895c9e6ca560764761450a16f3692d0f1bd7db2
font_01_sfnt_off0000fd44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11556 17724 bytes
SHA-256: 9ee6f8c0fd5a5390aa3d3939905a89ddd06918e99c9d1a6ae12dec34bb5b6737