Malicious PDF — malware analysis report

Static analysis result for SHA-256 4774bcc92e83d619…

MALICIOUS

PDF

70.3 KB Created: 2021-10-08 16:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d49e1c05ef2de2e8b3364af6e126c8b5 SHA-1: d47253291061eea34b2d0f8244e8cd05766c3f5a SHA-256: 4774bcc92e83d619b9b5d9ce8b089dec4d87bcab6fc5fbd292503676e9b11a91
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6613

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=can+dogs+eat+burger+meat PDF link annotation
    • http://watchimport.eu/In PDF document text
    • http://canadanur.com/resimler/files/58247012225.pdfIn PDF document text
    • http://devveb.net/userfiles/file/rukajinapafadenefoni.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/56400435416.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/nilufizabe.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ce6dfe7004---gotepiwoziseruxuk.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/depimitidaxatedami.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/rejemuwovunuradufupu.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1615fd34a2d090---47695535455.pdfIn PDF document text
    • https://kopari.hu/files/file/pupod.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/levufudarawazog.pdfIn PDF document text
    • http://kaies.net/upfiles/211007014455442046vleb4o.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/86438149688.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/vizagedabemulimejosu.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210926_AD769966C82153FF.pdfIn PDF document text
    • https://swapnauraan.com/ckfinder/userfiles/files/zekavar.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156a918a7808---ravegaxeji.pdfIn PDF document text
    • https://regenerateacademy.com/file/vigokeraxufefedazisowaban.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/vifid.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/96bfb5f717939443f9516b25523f1ccd/72350216580.pdfIn PDF document text
    • https://granitnet.hu/editor_up/79152521618.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/52707307091.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/tupebimokiladovi.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/dph0hea0ebbrpodvrkg58supql/pimirakafigawowadujosov.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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