Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a00baaad3360c2…

MALICIOUS

PDF

80.8 KB Created: 2021-09-18 00:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8c91fbfb37af8461ec77a25109f9c5ed SHA-1: 813bc2f6fa7921be256faaf5c80b372922361e4e SHA-256: 63a00baaad3360c28b7b7ed45bf362a04d7e327cc795231408a0d6004ab8eeda
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external sites, many of which are hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://promenade-perpignan.com/userfiles/file/tobabivom.pdf In PDF document text
    • http://darstin.com/userfiles/files/dofixow.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/15641215548.pdfIn PDF document text
    • http://fitviewer.de/files/file/kavepenoje.pdfIn PDF document text
    • http://www.slappedtogether.com/editoruploadfiles/file/rogivokunofipodejudoja.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/digigibigivalifowemupimit.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/56440243123.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef787e43fb---36324450919.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/27153223088.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/98682575047.pdfIn PDF document text
    • https://5of7edwardstreet.com/assets/media/files/33585785928.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/d2ad6d355335ff66bc5d0d101461f8a4/fefokamisinidinozinebe.pdfIn PDF document text
    • http://www.amanuttarakhand.org/ckfinder/userfiles/files/wigikatekopunizejajefev.pdfIn PDF document text
    • https://sitarasign.ir/data/file/87794839956.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46474513569.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/59793502092.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144903506b4a---fegedaxobakevin.pdfIn PDF document text
    • http://potya.com/49486328024.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/44549630493.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b272ad0efb---22839273973.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/wivisipa.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/firedovomajipux.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/6a468aac9619064676bb4f3492a34a02/25842533761.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/sonujevob.pdfIn PDF document text
    • http://dostrojar.sk/UserFiles/file/46636060548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+hack+into+an+emailPDF 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_off0000d97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 10396 bytes
SHA-256: 1b446d8d449a624fd9c09491d439a75eeec38e985fffe123a2c3a1adf9ebfe78
font_02_sfnt_off000108e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E8 17416 bytes
SHA-256: 29dd2ab5c985fb72b34c8b185e4195cc9f32c45fd4b2a2bb7412d92e516eb037

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