Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd585582601e4035…

MALICIOUS

PDF

81.7 KB Created: 2021-09-15 14:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cb79aa4c9c0fca243169a8a1757f055f SHA-1: 6589ebad2a6635ae59f182afd8b80f64770a0505 SHA-256: bd585582601e40358bb7e9604e419f46a390f2569d7467eacbbfe321419729ab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong attempt to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it functions as a lure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://nomylo.ru/uplcv?utm_term=how+to+add+live+net+tv+to+firestick PDF link annotation
    • http://geodavidepini.it/userfiles/files/26799676737.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3fceaffcf---sewaxujigiwotisop.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/78113132242.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/wakupivewoduwizubabomi.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b08c75c9b---jilim.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/xiresikuvegaleral.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/91305415139.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/zazafalalafuwami.pdfIn PDF document text
    • https://amgaa.org/temp/files/fumedupezizujijamubiz.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/vusorofetekomosifit.pdfIn PDF document text
    • https://vpmemorial.net/images/file/29538106805.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/bowiwemomuf.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/19347507921.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/54163923715.pdfIn PDF document text
    • http://gestioniarmatoriali.it/9495118328.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/41429741077.pdfIn PDF document text
    • http://expertworker.paraleumarian.ro/app/webroot/files/userfiles/files/remewivopokixumamo.pdfIn PDF document text
    • http://neapol-m.ru/usr/file/68392845066.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/91032482893.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/zujidepuf.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/domigozit.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/tesufilekosumivupeluka.pdfIn PDF document text
    • http://kim-clark.ru/files/file/zakonaganikudemunakenar.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_off0000d9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BE 17916 bytes
SHA-256: de1f204a9833f5102b88b55cb83bffde028edffa6d7a9d7b036025012c7d4c1e
font_01_sfnt_off000107cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 10704 bytes
SHA-256: 7072f32ddbc62f3dc78edd96e553cf1a995977efaeec0c3e379735e6e23e5f7f
font_02_sfnt_off00012084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12084 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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