Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e3b7977d676445…

MALICIOUS

PDF

85.6 KB Created: 2021-09-18 05:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 117e40f42597c2c2606ccf0fbeb09c23 SHA-1: 49172420f182dafbb87bdfb455851e1e81774991 SHA-256: 34e3b7977d676445fa609b8a6e5cd8dd2d3174c45696a92297173cac803152bd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for phishing or distributing further malware. The presence of external URIs and the link farm heuristic strongly suggest the document's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://laborke.ru/uplcv?utm_term=tom+and+jerry+movie+rated PDF link annotation
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/38895267735.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/24708844780.pdfIn PDF document text
    • http://ottomaniantextile.com/userfiles/file/potaxevotupax.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/22306647779.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/95893808269.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/51652462fc404b9e11a3c8dfe1dee07d/nemeroji.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/wariv.pdfIn PDF document text
    • https://aynispirit.nl/userfiles/file/77109107666.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/tepipogufalubor.pdfIn PDF document text
    • http://medrea.ru/upload/files/wubodexagokolanani.pdfIn PDF document text
    • https://gad-elhak.com/userfiles/file/bevesiwuxekewi.pdfIn PDF document text
    • http://friulanapanini.com/images/file/91498139005.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/72627550704.pdfIn PDF document text
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/bodis.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/lamekibijufijawajogelosex.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/34000909488.pdfIn PDF document text
    • https://fullprotec.com/ckfinder/userfiles/files/mofena.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/dadopipezugoxulokofulo.pdfIn PDF document text
    • http://hmed.vn/upload/files/fugivumutipaxezikopi.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd7d45ccac---zusere.pdfIn PDF document text
    • http://pb-book.com/user_file/file/balatu.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/89548703805.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/sudejazefogubexafanixu.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/fisimapexut.pdfIn PDF document text
    • https://snf.styleguides.ch/userfiles/files/bikavuj.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_off0000e612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE612 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE24 19760 bytes
SHA-256: 03b401045368d304f8fdb7044ac8490a70f727c14ba7ae00567ac3045928c9f0
font_02_sfnt_off00013118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13118 10468 bytes
SHA-256: 4c73a5125c2d59342ff52a598be7b7b8928fd173c03f02e975c16a22fa84bc69

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