Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0ce708e13b2fa6…

MALICIOUS

PDF

72.6 KB Created: 2021-10-07 11:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 562af8e84cce59e3545b2b36bae8d7bf SHA-1: 90b04484fea9cdaa6d0a2cef16c3669e69f47ac7 SHA-256: fa0ce708e13b2fa6354007f5837c2835099760a478e5dd3c4337e8e8a408cc25
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. The primary purpose appears to be directing users to these malicious links, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://foodbiz.bdata.link/upload/files/didogimixizalogenoxefani.pdf In PDF document text
    • http://malifer.hu/upload/file/nopalukaba.pdfIn PDF document text
    • http://orderkai.com/uploads/files/zewatuz.pdfIn PDF document text
    • https://nenanhduong.vn/Upload/files/tumixe.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/29838012839.pdfIn PDF document text
    • https://mekongtransport.com/upload/userfiles/files/19245804896.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/xenobina.pdfIn PDF document text
    • http://namngonviet.com/user-/files/60643678712.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/tigen.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/30b324630f748b29c7b444a179a7c173/22897564152.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1615dcea6e55d7---butugosofamedonilube.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/wefopowomerepafodepeji.pdfIn PDF document text
    • http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/lepuratudunumexo.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/13562586373.pdfIn PDF document text
    • http://vitrine-prof.com/files/pomosutazuwifusoxeku.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/15457434219.pdfIn PDF document text
    • http://infypos.cncmonitors.com/infyposcms/media/46167917850.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/75536958048.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/kofiso.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/rivulexaxivugulimijewoma.pdfIn PDF document text
    • http://a-mega.ua/images/uploads/file/10217781202.pdfIn PDF document text
    • http://tongkhomica.com/upload/files/disapejoni.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=list+of+hollywood+actorsPDF 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_off0000b8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F7 10496 bytes
SHA-256: 0d0ff2811d14c9c02f20fd4e7c2f36900a47de636f5824802208f95828c3de55
font_02_sfnt_off0000e907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE907 17084 bytes
SHA-256: 952ac6042ad3b24aa54885dc7d0043f0e3f5e9bb2a65682991218727971e04ec

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