Malicious PDF — malware analysis report

Static analysis result for SHA-256 a200362dc22be75d…

MALICIOUS

PDF

82.2 KB Created: 2021-09-13 08:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0594ae11e19b2d139bf7469495a313f3 SHA-1: 59eab798ca24eb2c893a88051b595e9d0cc1eb40 SHA-256: a200362dc22be75d7be9c4daf44d56f3ea82b4cafa27c47f514227ee59637593
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads and disposable hosting domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613de492d39e5---dobeberunenirozaj.pdf In PDF document text
    • https://www.profiemg.cz/upload/ck/files/30844166482.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/nategezoxowidezepuvajuro.pdfIn PDF document text
    • http://kprmk.pl/userfiles/file/74650207751.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/fuvisumurivudupu.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/tu69usnqu2jtvv8nffgjp6k4c2/kuzuvupi.pdfIn PDF document text
    • https://digireg.it/upload/zapegalab.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/koxoguzefas.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/piwobidovixotodemojero.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/161339a0a00f5d---kejalubilazedokilin.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/romeraxemane.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161357bc5337e2---89847219260.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/82167975580.pdfIn PDF document text
    • https://redac.ch/upload/bavukedupapogup.pdfIn PDF document text
    • http://countryclaim.cz/userfiles/file/77687658269.pdfIn PDF document text
    • http://wimborst-ceramics.nl/public/view/upload/fckeditor_images/file/wijafaxotapijunidukolewom.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134177737278---lifaworeredipamar.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ab5ce8acc---xatuloxuduxaledawavig.pdfIn PDF document text
    • https://whitesal.com/data/images/file/3391_20210913063352.pdfIn PDF document text
    • http://riviera.az/userfiles/file/gisafobukogapuxojixujo.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/12687131950.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/bibuwi.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/16619232137.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=50+shades+freed+putlockerPDF 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_off0000d0eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0EB 22040 bytes
SHA-256: 1bdd4448e492f0f2e85b74a055ef3b058e225517d4bba728805009634b2b0ba3
font_01_sfnt_off00010a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 10872 bytes
SHA-256: 8b16b5f07a7494c5f1950935c8c455255a12b43d1298e45d4b5c7ed8ddb6cb94
font_02_sfnt_off000123af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1