Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee3e3928e4ac031…

MALICIOUS

PDF

69.0 KB Created: 2021-09-30 20:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 966162d546b05cfb0a3b3665a904e702 SHA-1: 06cc4ceb4a7f8562e516227469d2849c540d6366 SHA-256: bee3e3928e4ac031cdeae5ae859485f8e3ffac3cf41563a2e7dadeb98414e13b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting an attempt to obscure the true destination or to distribute various malicious payloads. The presence of these links and the heuristic identifying it as a link farm strongly indicate a phishing or malware distribution attempt.

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://irlanc.ru/uplcv?utm_term=download+dream+league+soccer+17 PDF link annotation
    • http://mosme.org/uploadfile/files/vabukivakefetofuvabiga.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210925100802.pdfIn PDF document text
    • http://cerescommoditiesltd.com/Images_upload/files/fugebuzuzuzetudiniso.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/wusogugipijupapimasedumus.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/53549489931.pdfIn PDF document text
    • http://rrarental.org/upload/file/metabutejut.pdfIn PDF document text
    • http://abhinavabhishad.org/userfiles/file/kinixelomivumifavemasolor.pdfIn PDF document text
    • http://kelvista.lt/images/files/pulurise.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/68886165215.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/657271990.pdfIn PDF document text
    • http://opsir.eu/files/file/jelidigir.pdfIn PDF document text
    • http://net-work.cz/data/file/lijaxejofi.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/64943771002.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/kibuvam.pdfIn PDF document text
    • https://vespaclubcagliari.com/userfiles/file/gupisagiranepu.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614e9e80de3d2---36434784810.pdfIn PDF document text
    • http://strandkrabbe-hohenfelde.de/sites/default/files/files/kewekodidevulig.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/raxapujewu.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/7ea596ad730538c3d853506e0f7c3b9f/wubanudoj.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/kumutatoxusukoxakujawuto.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/fuziko.pdfIn PDF document text
    • http://ecosdaliberdade.com/ckfinder/userfiles/files/ziloxexoxojiwep.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/73242052456.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/56650031622.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_off0000af8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8E 15224 bytes
SHA-256: 71fa7a6850513c898b6ee8ab27e8c5cd7f88e03f248ed70bc81448bb26c76db4
font_01_sfnt_off0000d5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E0 10812 bytes
SHA-256: e4d678a1c24f65f824aae13e31ce7f9b882fecb2674989e508adb5a61e4f6dd3
font_02_sfnt_off0000eec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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