Malicious PDF — malware analysis report

Static analysis result for SHA-256 899cc779084e2465…

MALICIOUS

PDF

83.0 KB Created: 2021-09-05 13:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d36c7c79e17a6a6e8b1ddd31d8a9bfb8 SHA-1: 42cccb7464687272d9f1c985af32789607e55a72 SHA-256: 899cc779084e2465df7bf4a69792733e2554f1cbab7bee3c88b7988d92626bd8
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566 Phishing

This PDF file was detected as malicious by ClamAV and an ML classifier, specifically flagged as a brand-impersonation credential phishing lure for eBay. The embedded URLs point to compromised WordPress upload storage and disposable hosting, indicating a link farm designed to redirect users to malicious sites. No scripts were extracted, but the PDF structure and URL analysis strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=bessacarr+e795+owners+manual.
  • 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://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed4dd05ca6---73071331030.pdf In PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/76953104887.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a39a66a2a07---zorobetajugasikax.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/8994171855.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bc3d608e7---21874042765.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/c9e62ab307eddc795cd31b714ce557fc/67901951895.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wexejinemaxepex.pdfIn PDF document text
    • http://zkpower.net/upload/files/21775084948.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/kuwamisajadojutipibilek.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/gitupekukipapifos.pdfIn PDF document text
    • http://word.mn/uploads/assets/94508959399.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/aq527vanphp3bdb2471dqu32q7/18036771031.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/dilekutovinoxi.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f269cf1c0e0---sarivepetatedeje.pdfIn PDF document text
    • http://intersonik.eu/upload/files/kaluxek.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021070320184239552.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/83ebfc453271a28264cc3ecc13fd618d/vugasemokefawakewudo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e10e3c269.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/dafogamijajonevozof.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/tifujukomofoporosugavaxoz.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/94242905854.pdfIn PDF document text
    • http://honda-vo.com/upload/file/wewozewadavivawakibim.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/joduwoxuzenevelubet.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c80aed980---45423635211.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb9f513e6e---tawinalazeze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=bessacarr+e795+owners+manualPDF 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_off0000de9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9F 17956 bytes
SHA-256: 82f7866771e03713ee0e2a0914c267bb09a8fc374d97607069752aea7b5716be
font_01_sfnt_off00010d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001252a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252A 10792 bytes
SHA-256: b79e4944ddcf429c38f5ec082e9f3b15221b7665304a601463fe18d701ae6cc0