Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd777ea41cd1502…

MALICIOUS

PDF

115.1 KB Created: 2021-06-22 14:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c55114bab4ab9c6baf7299bef061f6f2 SHA-1: 3bd8a06b59c6d9f598590703f84d1ff3468c601f SHA-256: 0dd777ea41cd150234f5ae8a417b108b1f1a34e16099c02d4f2f6f4ad325e760
164 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm pointing to compromised WordPress uploads and disposable hosting, likely intended to host malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, with the document likely serving as a lure to download further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=ultra+shiny+gold+sigma+walkthrough+guide PDF link annotation
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/trmrqkirvt2dk2cqdgetp9sbfs/28944473178.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f99e5648cb---39169446531.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/2ef4bbc98af160e81d4586020fd8e97f/panokomawinud.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/6449503934.pdfIn PDF document text
    • https://shidoremicrosys.com/media/sigonitekizinawabega.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/qt6uaaje188cgk2708lfehbed3/kutumagoganizubivikupeji.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/jurar.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/17664565532.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/8n17c2fmro1i4ac5vertnohvlg/92813204420.pdfIn PDF document text
    • http://quick-thailand.com/images/uploads/file/73098156822.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/82083387726.pdfIn PDF document text
    • https://bliznacite.com/files/viwujuw.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608952387dcd9---gogijobowomirutuvegub.pdfIn PDF document text
    • https://piuspvc.it/userfiles/file/96994865196.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/81689006550.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001836b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1836B 5488 bytes
SHA-256: 296e58534d97eb12ab647c50daedea5eda160ac505ff758dd87df4af8ba6fcce
font_01_sfnt_off000195ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195FF 12588 bytes
SHA-256: 9110f0de99b1354645139df6e3a139d8a23561a20be2337eece3c4b017a21566