Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce95d6387767e4a…

MALICIOUS

PDF

76.4 KB Created: 2021-10-03 00:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: d3a257a170b66af4abc80c966391180b SHA-1: 07d38fc37090519d039f6cb05cef07fea90de04c SHA-256: 3ce95d6387767e4a2e59b11a09b21ddad69929d9cfc9355fcbb1a842af1b506a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The PDF structure and embedded links suggest an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://allytemp.ru/uplcv?utm_term=habanera+meaning+in+english PDF link annotation
    • https://bya-ingenieria.com/ckfinder/userfiles/files/vidalaneseror.pdfIn PDF document text
    • http://kgmda.com/upload/files/vutewi.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/pudefesi.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/57171919175.pdfIn PDF document text
    • http://marketingnews.fr/images/file/zewevi.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/zenuredupojo.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/91271988272.pdfIn PDF document text
    • https://www.borzabadi.com/ckfinder/userfiles/files/lodowafetubasaxipijosu.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/wigobof.pdfIn PDF document text
    • https://puntodeplacer.com/userfiles/file/zolopokafarufakerifa.pdfIn PDF document text
    • http://contrast.no/ckfinder/userfiles/files/15626729862.pdfIn PDF document text
    • https://zzwgjx.com/d/files/povutusikibefawurekomalu.pdfIn PDF document text
    • http://mfcpavpos.ru/file/zudapaziranepij.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/pevegoxofazategogopo.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/vimusuzuk.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613262716780e---laletujaju.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/reburovuva.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/sinowu.pdfIn PDF document text
    • http://catwalkexotique.com/userfiles/45511973168.pdfIn PDF document text
    • https://sayurhijau.com/contents/files/23343331124.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/xutumo.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/34460538283.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/14520011154.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_off0000bf87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF87 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD799 20228 bytes
SHA-256: 5ba54251306a9ff115048d154393046b06ec13d615d521af307ae8bf69dee824
font_02_sfnt_off00010c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C08 10468 bytes
SHA-256: 031a182602e46d2a55ac78ccfba4b84715f5cd796cfdad6b4085b8bd7a1d86f7

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