Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b0be40fdf20314…

MALICIOUS

PDF

77.4 KB Created: 2021-09-20 07:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 20867d4a9470b63c2ccc20f2d35657e7 SHA-1: 767e113075497eab84280b9759c674cb0bcca8ad SHA-256: 15b0be40fdf20314c3c0d82ac063a0d1765caa0a68e1365267c2cfac7d30573a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs pointing to various domains, likely serving as a link farm to redirect users to malicious sites. The PDF structure and embedded URIs suggest an attempt to exploit users through deceptive links, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://garglob.ru/uplcv?utm_term=your+beauty+mark+pdf PDF link annotation
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/91510848499.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/dagaminumisesiwefasef.pdfIn PDF document text
    • https://sushixusa.com/userfiles/files/xerezebelutigu.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/sixisuzebapufogoxisosika.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16146eab79d610---vojugu.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/7558212890.pdfIn PDF document text
    • https://s-h.cc/uploads/files/202109060432108879.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/92976312348.pdfIn PDF document text
    • http://infas.cz/images/wiswig/file/51822806846.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161443c7a8924f---dopojajaxiwux.pdfIn PDF document text
    • https://magerp.org/upload/files/fupiza.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/koruvezakanipufi.pdfIn PDF document text
    • http://ivankrivanek.com/userfiles/file/78307907868.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/50302405226.pdfIn PDF document text
    • https://daulte.com/ckfinder/userfiles/files/taxebejodatibizipibedavav.pdfIn PDF document text
    • http://turksebruiloften.nl/userfiles/file/nifenimidebesojufoj.pdfIn PDF document text
    • http://vatlieulamnha.com/media/ftp/file/82953366019.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/duriwejesit.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/polizujuxazetimogon.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/49730728443.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/xagarinaxibavutogozizaj.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/borej.pdfIn PDF document text
    • https://7mark3t2-7aya.com/contents/files/72145712313.pdfIn PDF document text
    • https://alaskaproauto.net/nbloom/fckuploads/file/zilumalazukigofukupak.pdfIn PDF document text
    • https://familienbilstrup.dk/ckfinder/userfiles/files/70745232660.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_off0000ca79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28B 17744 bytes
SHA-256: d2e5c3976806201f7ea0ac220c2600253c42d371a91e306db7560840df501567
font_02_sfnt_off00011029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11029 10680 bytes
SHA-256: 0a859a0afae993dc65a099d77d8447a1f62d5b3c9553736f6ec589b9efc7fbd1