Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9dc2ca2e45d2cb8…

MALICIOUS

PDF

83.5 KB Created: 2021-09-20 13:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7cfba416d2388bc172d735dbd96c0bd7 SHA-1: 2e58cd92a4d5c19e4f5ee3a2bb6916522f28ea41 SHA-256: e9dc2ca2e45d2cb8ab749faff7dbbe07947a71c55877b65c8cf51238ece22eb6
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. The document contains numerous embedded URLs, many pointing to disposable domains, and one specifically mentions 'blade runner game download' in its UTM parameters, indicating a lure. The PDF's structure and the presence of many links suggest it functions as a link farm to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • 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://kohphanganhotelandtour.com/userfiles/file/2573381442.pdf In PDF document text
    • https://satbietthu.com/luutru/files/firalokomuj.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109032259503787.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/vawukigenolakok.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/67355364011.pdfIn PDF document text
    • http://szwygs.com/upload/rifalu.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/givewozesamaxilax.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/23917399171.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/1146792813612f94946d9c6.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/nebikomitadoson.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/198722422.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/fizejamuwaxuvabeges.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/vavovakeduwajuvizopexivuz.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/59099560513.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161392b9dc2db5---wagivawozif.pdfIn PDF document text
    • http://mayepnuocmia.vn/data/ckfinder/files/lolakinovebud.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/sopikuden.pdfIn PDF document text
    • http://levant-tekstil.com/other_files/File/nuxitijufitovisipeladej.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/babijez.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/35955187566.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210905154831.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/97668633324.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/29332328477.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/sevavevetinonovidamelabug.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/2d09c6db3d453d420def9cee59c5ae25/21237032050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=blade+runner+game+downloadPDF 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_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 18132 bytes
SHA-256: 77f9b8db7e07088fab4222337a0d3819272a85d19118d0de6152ed02551bec28
font_01_sfnt_off000110e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E7 10472 bytes
SHA-256: eda8879ba496dbf800cd7a5778b55d40bb7be405911fc2519e5d8c43747f2eb3
font_02_sfnt_off0001287b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1287B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1