Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c018373470e063…

MALICIOUS

PDF

68.4 KB Created: 2021-10-01 04:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e1293d4b13c37285ac3ec81c3bb34e3f SHA-1: 63aca89e3564b3727e0175b95f6b3f765dfbb7ec SHA-256: f0c018373470e063a82c9d015959107b59298fa60f8e34b508370f62c1429f65
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing campaigns, containing numerous external links. Heuristics indicate it's a link farm on disposable hosting, likely redirecting users to malicious content or further phishing pages. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://garglob.ru/uplcv?utm_term=gangstar+4+hack PDF link annotation
    • http://grandioso.asia/editor_upload_image/file/nipemonugo.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/66485035013.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/wefikalanet.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/ditiravopofi.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/kotupewofebawu.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/96244507754.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/zapezewa.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/85473936699.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/80584623033.pdfIn PDF document text
    • https://kozmetikadunakeszi.hu/userfiles/file/92306105709.pdfIn PDF document text
    • http://zenithmetals.com/files/23831146198.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b0ba129387b349ba886eb32161b26449/korakimuliriket.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/55504489386.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021093016010273499.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/dotexunebunotulevaja.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16325087958129.pdfIn PDF document text
    • https://10fci.net/userfiles/file/71623685428.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/22606216197.pdfIn PDF document text
    • http://hzxgdz.com/images/upload/File/63330149923.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/18252600519.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/48066084900.pdfIn PDF document text
    • https://isagrinio.gr/userfiles/dazazebimunaba.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/sokuwozapiruwiluxo.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/jolimezowaron.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/xijagumupuwuzewuditob.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/tedudafamegunuzajoto.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_off0000b0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EA 10328 bytes
SHA-256: 45046dbe33a9ff3de9ca0e9a8d92204e119b83ba4dc7964ac44fd05575c68379
font_01_sfnt_off0000c83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 14420 bytes
SHA-256: 695b9a9d499944663ecc633b193e1a14a67eb7727050fdeb7851410d73ed6d4d