Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc48d786a9ff17bf…

MALICIOUS

PDF

82.2 KB Created: 2021-09-18 12:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d85a9e51f48df8570cf3e28df9d3cefd SHA-1: 310b3df9f06ab9db53f8c08e4b1f5bfcc6630413 SHA-256: dc48d786a9ff17bf794681016eafc1a4ac774b319d9866a86e6ffd7972c9c07e
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and multiple links, some pointing to compromised WordPress sites, suggesting an attempt to deliver a malicious payload. The presence of a 'download' button heuristic further supports a phishing or malware distribution lure. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://alajuusa.ee/media/contents/file/lufuvisudulegopejeso.pdf In PDF document text
    • http://www.logomarcanet.com/userfiles/file/93018941914.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/xunigepabosakija.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/ropugugumugujiwasusoren.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/gituk.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16133b70dd91ca---fodazupotaligapetu.pdfIn PDF document text
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/wobakenukekuliduporewisi.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/38304893666.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140792751078---sewixusopetubezapafufi.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/lidoxijaxigajopemaleju.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4b2438855---daxoxovozonajifatugapego.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161449f75699f8---91165660843.pdfIn PDF document text
    • https://codecs.ro/images/file/95219288630.pdfIn PDF document text
    • http://goldartline.ua/userfiles/file/pipuxadefitamiguveminuji.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/63234091871.pdfIn PDF document text
    • http://studiosantomauro.it/userfiles/files/79706213647.pdfIn PDF document text
    • http://pneusmarene.it/images/file/31888535519.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/93204822900.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/86418209646.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/moxoper.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/jesumisukasu.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/58796744175.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144c2e30ef7a---xarud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=gta+4+mod+apk+android+1PDF link annotation
    • 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_off0000db3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3C 10468 bytes
SHA-256: 10cd0eec1892e814bb6c409ce12213e668b1631a91be104f0ce522168f62a0d7
font_01_sfnt_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 18688 bytes
SHA-256: 8de240493ee89864261133ad0410b8e39ef3498ede6b02ea95ca67e3390c401f
font_02_sfnt_off00012335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12335 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.