Malicious PDF — malware analysis report

Static analysis result for SHA-256 22fd9f328049604a…

MALICIOUS

PDF

79.8 KB Created: 2021-09-20 00:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7d4f9a20ad1b884eb3809dc735c495dd SHA-1: ed300aeb5a7eb9b4e312098ac245cd388d64a503 SHA-256: 22fd9f328049604a43bf3aae8ac3a4f4edc1309d3ba5e74d4e0bf5d9dcf575cf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to an attempt to execute code within the user's browser.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://philabc.ru/uplcv?utm_term=how+long+do+you+have+to+wait+to+plug+in+a+refrigerator+after+laying+it+down PDF link annotation
    • https://ymy-tea.tw/upload/files/berexirato.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/27341591543.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/7427237583.pdfIn PDF document text
    • https://kolkatanagariksammelan.org/ckfinder/userfiles/files/bavinomot.pdfIn PDF document text
    • https://shevian.com/images/file/mujivipuk.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/59629375655.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/tnar7jl95jv6hjj02deogbf09d/sekukawivoxawopevasegilux.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/jiviwipubuxi.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/14088044455.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///66539885965.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/zibijube.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/pifunowi.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/2025968865.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/8181564315.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12107549964.pdfIn PDF document text
    • http://mistral-paints.cz/userfiles/files/1895265223.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/lumin.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/3168159240.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/wibusutepov.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/lunitamal.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210914_060946.pdfIn PDF document text
    • https://acavacecio.it/userfiles/files/46319302167.pdfIn PDF document text
    • http://www.llmhospital.com/www/js/ckfinder/userfiles/files/98092997403.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/xomojeti.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/43250713207.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_off0000d426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD426 17008 bytes
SHA-256: 3bd5dec8e0b63552af8ba4a3e00c8ab6224aa8fce0fbde3e2cb4979c59d4a9b7
font_01_sfnt_off0000ffe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FE 10968 bytes
SHA-256: 82211e26b9eefe06faefe0123636cadfd0c4b0a36a94c8ff01d290857f3453e7