Malicious PDF — malware analysis report

Static analysis result for SHA-256 298e68fee2ddaa7d…

MALICIOUS

PDF

68.3 KB Created: 2021-09-28 05:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 00633b4893258275a95529330fba4a4b SHA-1: 515a03d7f2182840eeebeaa460f23f6ca2e26e9c SHA-256: 298e68fee2ddaa7d8d518495ad6d22f230976d056bcc4464cb7a4d342e2ca817
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF is identified as a phishing lure due to its small size, image-heavy content, and numerous links to external websites, many hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent. The numerous embedded URLs suggest a link farm designed to redirect users to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://meridianchem.com/meridian/ckfinder_userfiles/files/lonekigexiwutedo.pdf In PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/2d7abec67615e42a1582bb7a47d058ed/nilemuwi.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/liruxoluzinokixi.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/fefozazaxodukowe.pdfIn PDF document text
    • https://hkki.org/userfiles/files/94103651279.pdfIn PDF document text
    • http://trivio.it/userfiles/files/pobad.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/lupovekapezulifixufuk.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/84884291095.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/52851128566.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/608e2f7db89c2e13614525cc43229ac2/bafep.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/67517770049.pdfIn PDF document text
    • http://gachbinhduong.com/upload/file/38906433264.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/xedijo.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614855bf8913f---dumikonudigi.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/xanavupiforatavaderagitu.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021928231546977.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/mizobejozupuwiludurimaro.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dca5cc5e80---supipiteromoforivogede.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/58541121438.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e5de9be22---wewowonebaxegekunilopazon.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109220150239572.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/tanizufizij.pdfIn PDF document text
    • http://apvn.info/userfiles/file/87911931932.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/pafapasukezuzexaxi.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/36395607402.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=bhagavad+gita+chapter+7+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B2 13652 bytes
SHA-256: 47eeb9f68fbc791a6b6f16cb36a5a3df702b0db0bfe80e83ae5bca6932f09c98
font_01_sfnt_off0000d398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD398 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 10632 bytes
SHA-256: c2abef9e4052e007523e4bfcaf2780bb07a67ad93499f243bebcbd6a02fc91c9

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