Malicious PDF — malware analysis report

Static analysis result for SHA-256 861ea7030aa1b5b1…

MALICIOUS

PDF

70.5 KB Created: 2021-10-01 07:12:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0e19db423f8d22dd943336b25d122a81 SHA-1: 13ba9159617a35db95a502e34142c32ccd1f5000 SHA-256: 861ea7030aa1b5b165524f298e0b2a73190b0aa96887d26641a9b5bb7e36518d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are indicative of a phishing campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.mmgrowersg.com/ckfinder/userfiles/files/metexezuvejamad.pdf In PDF document text
    • http://tythb.com/uploadfile/files/8934508333.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/45727249423.pdfIn PDF document text
    • http://hcm-invoice.vn/hinhanh_fckeditor/file/46656534588.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/90202056572.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16145240cb1455---86348737793.pdfIn PDF document text
    • http://lex.tj/img/file/sifajunevinidufamulin.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/levozilokubewetaxitu.pdfIn PDF document text
    • https://protum.se/file/11262369344.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/61373609458.pdfIn PDF document text
    • http://oawebserver.com/piceditor/file/gimulit.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/felutunedalas.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/52858355599.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/zuloju.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/nowizotasumotutama.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/weruzarelusuxesanumaj.pdfIn PDF document text
    • http://zubrcup.by/files/files/xajajazon.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/85074733184.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/86963667002.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/8709650059.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/masifudomomukibejet.pdfIn PDF document text
    • http://hoanhaochemical.com/uploads/files/88394458908.pdfIn PDF document text
    • http://encino.kopanramen.com/uploads/files/zesovusaxepofojugogaziwef.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/86036475058.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161463bd127784---gipirobegipalukek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=spaceflight+mod+apkPDF 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_off0000b392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB392 10860 bytes
SHA-256: 4e8faf9c9ce98ecf829fe242f326df0391b5d49b8b2f99c6659b6fca15bf42b1
font_01_sfnt_off0000cc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48B 15788 bytes
SHA-256: eb61cccfb57d84e6f3eb7c0a83370370d032e71dd5f34cd9a51f13925fe358ab

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