Malicious PDF — malware analysis report

Static analysis result for SHA-256 5500e201b153e592…

MALICIOUS

PDF

71.1 KB Created: 2021-09-27 05:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a40b0b50d1cf32c6e3aff615b1f10b90 SHA-1: 2d5da5ccdd533b5be9865ea243f9805e9a2515e3 SHA-256: 5500e201b153e59213c07c3c88f0f74456c9049c73acdbaf035e050c27d4a9f0
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to a link farm hosted on disposable domains, indicating a likely attempt to redirect users to malicious content. The 'utm_term' parameter in one URL suggests a phishing lure related to movie searches.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://qapoll.com/2015/vat/upload/files/kafanefolaje.pdf In PDF document text
    • http://mertcelikkapi.com/userfiles/file/nedenewunovasaramo.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161337b44ab72f---90951620353.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/63482432341.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/2644784226.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/9750437167.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/runejibefawapetogegamim.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/dawiwidejapileweji.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/67938550384.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/32937880635.pdfIn PDF document text
    • http://studiovalecchi.it/userfiles/files/4138981953.pdfIn PDF document text
    • http://jakpaisanestate.com/images/upload/files/55701349351.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/rabetasejikutakijovor.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/lezisiruz.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/87430441171.pdfIn PDF document text
    • http://philboyd.com/wizunefiraxure.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea2e5e1882---wezixasowitawijenum.pdfIn PDF document text
    • http://ontozescentrum.hu/tmp/80861476116.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/27165289016.pdfIn PDF document text
    • http://7166867.ru/ckfinder/userfiles/files/15109506953.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/ranegilometitasonidari.pdfIn PDF document text
    • http://kaies.net/upfiles/file/4396935172.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72849195074.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/85091899103.pdfIn PDF document text
    • https://x-leather.com/radsportfiles/file/60546087027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=bend+it+like+beckham+full+movie+watch+onlinePDF 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_off0000b318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB318 11012 bytes
SHA-256: c795ebc401e091f9e3fcb17941f99e24e1fed5dc0c664881d99718da34bffe05
font_01_sfnt_off0000cc89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e49b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49B 16164 bytes
SHA-256: d026fc218e75ea8fdf853e3f77bdd660b439abd45d7386ed85f9316ebb1200d9