Malicious PDF — malware analysis report

Static analysis result for SHA-256 9145018c5d54b326…

MALICIOUS

PDF

86.2 KB Created: 2021-09-12 20:02:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 84ccf01c11bad0ecd787e9f280ec27e8 SHA-1: 37f7d666fc1937c32f07d74590d17e8c5c9b212c SHA-256: 9145018c5d54b32689a32cf48e924df2492cce9af8134254b8503225c72d974c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to various domains, forming a link farm, which is a common tactic for phishing or distributing further malware. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://aisne.proximeo.com/ckfinder/userfiles/files/zokoke.pdf In PDF document text
    • https://moveo-sport.pl/userfiles/file/vuvolijovazagukukixuginux.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/tepov.pdfIn PDF document text
    • http://basar-hemeringen.de/ablage/userfiles/files/bajejuxoz.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/85361826107.pdfIn PDF document text
    • http://www.moyekolodin.com/files/renubasob.pdfIn PDF document text
    • http://tunecharts.com/userfiles/file/josovawonujamalerugepesap.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/88153407866.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/161334c2dc2d28---fexokebelufegototupave.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/lakulufawoxisinidiwu.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/89967386129.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/73524709655.pdfIn PDF document text
    • http://studioturina.com/userfiles/files/gewoxese.pdfIn PDF document text
    • https://rosettes.it/userfiles/file/10540829377.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/diferijepederukij.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/12231719103.pdfIn PDF document text
    • http://gianphoiduyloimodel.com/Images_upload/files/72086714439.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341883e8bef---pomigazutoj.pdfIn PDF document text
    • http://wiskind.com/filespath/files/20210907025544.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/65702261586.pdfIn PDF document text
    • https://limadelimon.com/images/file/jesubiwivajuledi.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/xetejanadigodikufagoxul.pdfIn PDF document text
    • http://pc580.cn/upload_fck/file/2021-9-6/20210906063742764064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=walking+dead+season+1+modPDF 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_off0000eb42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB42 10528 bytes
SHA-256: d9fa5ed065f4b40b66c76c9e5fc5eafbbff3806d2627b510baa69bf3fb250853
font_01_sfnt_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B17 18864 bytes
SHA-256: 7986bf14be9dc95f6e33a3e65c73cd90fc9eeea79765febecdc8e3cb2a499492

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