Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19a289b5cf0e4b0…

MALICIOUS

PDF

86.2 KB Created: 2021-08-06 04:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 30f6ceadaefead58849ff51030351a76 SHA-1: 0acf0aa72e15ef811c8ee7918eb461bde9324b43 SHA-256: d19a289b5cf0e4b01188b6b2f9ce10d6988908cd0f80a9309da40c4401ad13d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links suggests a link farm designed to obscure the ultimate destination or to leverage SEO poisoning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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 http://olddieselparts.com/ckfinder/userfiles/files/nixudigine.pdf In PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/fixixa.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc4ae2b159---rebakiwanunofowulepozu.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/zexasuwusofenazekose.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/64994825487.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/4add3305cdc56038adf13b3b1a93f65c/solofikupaberapo.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/78806883705.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985fef8853b---pofodusason.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/kutepukegawebeni.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/94cuu7br50na3hmso5omavucd4/sojagojumoro.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160855af914589---dozekolatirug.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/ad663b63f10b2552e07e8c9ee42dcb13/75531893981.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/manopinotowukigu.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/niwataka.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/96912965827.pdfIn PDF document text
    • http://kalikraft.com/images/file/65586402622.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/364116dba92cf0c79d3dab058bb00847/sataxiti.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69832545802.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097f30a7ea2b---5928036244.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca6c7848e0---46505133763.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/sutokekazoba.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/78362455101.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/dc88a7e2ff8ef5722f1dfdc69a87ef4f/9792085010.pdfIn PDF document text
    • https://cartolmania.it/file/dajijefuto.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/juzudetabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=wudase+mariam+tselot+amharic+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BD 16980 bytes
SHA-256: fa6acec7d153f53f57f93beba81286eb4e73a5a8d956c241de50e5baf4624de5
font_01_sfnt_off00010313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10313 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_02_sfnt_off0001188a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188A 10876 bytes
SHA-256: 0169e667e48696643db2938b8dbea4ab8d6cb904c4099783253cf30a1e499847
font_03_sfnt_off000131ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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