Malicious PDF — malware analysis report

Static analysis result for SHA-256 d405c2d808665887…

MALICIOUS

PDF

79.0 KB Created: 2021-09-15 20:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: e06c48fb20828798ae62519c7aa114c9 SHA-1: a20c195dd42e37c8ef2a90c094edfaff2ea5b1b0 SHA-256: d405c2d808665887789e1444bad53cf5c1576ad2ad5b7bbc63bfd93b47af1e61
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 malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript points to an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://krisoc.ru/uplcv?utm_term=pokemon+hack+download+apk PDF link annotation
    • http://singer-island-condos.com/userfiles/files/57716028168.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/17673530800.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/gomur.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/52338448788.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/2215089915.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/dokoxatamaguwepujuwuri.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/pesajosake.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/35775542867.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/7162401586.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/87291219448.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/36480474335.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/79692000866.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/55284252734.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/bumoboz.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/90653139460.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/womabefadage.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613c90bbe1648---raveromobazete.pdfIn PDF document text
    • http://ver9ctrl.sonikgps.com/ckfinder/userfiles/files/puduzawexuniper.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/ranobojevefaxifibigowiwuk.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/puxonufasomije.pdfIn PDF document text
    • http://multiflex.ru/userfiles/file/40023349397.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/nowetinepaxin.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/84146884589.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/82253683173.pdfIn PDF document text
    • https://tigaintan.com/contents/files/70567548808.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_off0000d093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD093 10500 bytes
SHA-256: 38df4ead7fc1886c9169632b9fd5534647d29753a691c764c2630a21e595d8a5
font_01_sfnt_off0000e850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE850 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10062 17792 bytes
SHA-256: a8e437689ea80f25117dc0d3bed91a71bb39188fb761030ef2f2d764a1578aca

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