Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e52d123ae9cde86…

MALICIOUS

PDF

97.7 KB Created: 2021-09-11 18:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9b91ec1f5e9dc07fd8301a94697b3dcb SHA-1: 89ac77203c2cd47a413ef5ddfe53f5261179d568 SHA-256: 4e52d123ae9cde86b0c1a184efa789bf1c6ac80560ca8fd055babf17fb8d98a0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, with one specifically pointing to a URL containing 'how to spoof pokemon go', suggesting a lure for potentially malicious content. The PDF structure and embedded links indicate it's designed to redirect users to external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://queure.ru/uplcv?utm_term=how+to+spoof+pokemon+go+2020+android PDF link annotation
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161369bf2014a0---96101658775.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/gukewibatadem.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/40411506838.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/64835008408.pdfIn PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/gopobazafozivazoz.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/59993899141.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/45b4bf15e989f24501a246f6996d7dea/71486431207.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/53181176628.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/38073728648.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/vekataduzide.pdfIn PDF document text
    • http://3dsami.org/uploadfilefiles/56252263071.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/zelodojom.pdfIn PDF document text
    • http://leton.pl/userfiles/file/30088410283.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210903_050554.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/85520887376.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/mizudipukuxirop.pdfIn PDF document text
    • http://isystem.hu/userfiles/file/zomuwezowaguxelu.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/2968064281.pdfIn PDF document text
    • http://pb-book.com/user_file/file/59796940566.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/37496965651.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/vosozexowabuvodetiruxo.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/63872090340.pdfIn PDF document text
    • http://coumert.com/images/file/rovubasepifulenopew.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/nobowunujafepitotu.pdfIn PDF document text
    • https://auto826.com/uploads/files/jejinojivafedafaven.pdfIn PDF document text
    • https://proxus.nl/file/67858461520.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210903192714.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/mapud.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_off0001164c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164C 11208 bytes
SHA-256: ddd8d58280db4479f3822d7e0cbd69b8d52edfdc3774787100a7c10c394b6edd
font_01_sfnt_off0001306e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14880 18784 bytes
SHA-256: a7de33df17a9eab95e9534286c7d9a63e1966533ce8641b9579ef87d301c1014