Malicious PDF — malware analysis report

Static analysis result for SHA-256 780d392bb9b7a3a6…

MALICIOUS

PDF

84.8 KB Created: 2021-09-18 16:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 948e4d2c900f090ac6c5f50c5007dc47 SHA-1: 710402183de80c27578fee992eabdbe3db9e0025 SHA-256: 780d392bb9b7a3a6a051dc3a05a3674e8fd08ed212221506de6fef51acb88352
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ketchas.ru/uplcv?utm_term=pokemon+platinum+gameshark+cheat+codes PDF link annotation
    • http://rosg.net/sa_upload/userfiles/file/20210902080005.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/98172091989.pdfIn PDF document text
    • http://gattoneva.pl/pages/userfiles/file/fepimelivifan.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/jizosa.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/damurimonepurewobi.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/43107092027.pdfIn PDF document text
    • https://chinese-wall.tw/upload/files/92278537648.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/kinakom.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161302d0d89cc3---16719612906.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/70510450211.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/21867506139.pdfIn PDF document text
    • https://maggies-handmade.com/UserFiles/files/mowanogagesile.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/porimi.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/210902095013565961o11wsk.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613e6ff0d1f56---popiluvolutujito.pdfIn PDF document text
    • http://esistore.be/userfiles/file/vikenozunovozazokotibeluz.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/52738891335.pdfIn PDF document text
    • http://furniture83.com/upload/files/73230394946.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210903030942.pdfIn PDF document text
    • http://bayernglobal.de/userVZ/file/wafediz.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/towaxezamimukodetukefozaf.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/96767496815.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/90085770336.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/fotusozudaxir.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/moxulile.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_off0000e6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CB 11156 bytes
SHA-256: 4a49f147bbeeb1d86722fa43398618244ee8ec4ea84d7ece990f3dc451fe3de7
font_01_sfnt_off00010076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10076 17448 bytes
SHA-256: 38fcabef700d74f2c477db27f204098c1a535c278a56f4aabbd773256b19fa43
font_02_sfnt_off00012d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1