Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbaef0a3d51377b5…

MALICIOUS

PDF

67.7 KB Created: 2021-09-25 10:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dcc50b4b07bc2ed35dd07cb4008a4525 SHA-1: b354e0dcac4ac16012ac377c754cfcbe2ca725e8 SHA-256: bbaef0a3d51377b5eaf222a95716974ef193f2a8323a263a186c1bca2b92631e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://huntic.ru/uplcv?utm_term=pagglait+watch+online PDF link annotation
    • https://qeyeoptical.com/ckeditor/ckfinder/userfiles/files/96754157163.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/15101119058.pdfIn PDF document text
    • http://wdnederland.nl/file/57829372033.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/24868641182.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/02844e3322bdd57e182f3cc0290f521c/potarulewokawejofizemiru.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/befikizomelaxewib.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/47094670535.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/56360512265.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/tamere.pdfIn PDF document text
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/vavegixuzepinufesevu.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/25955585222.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/kagekixevavojipamakepog.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/jepulukaxorod.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/munagipatev.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/5dabae1cc641a1a3bef47e5c95c55a6d/66030455399.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/51818552767.pdfIn PDF document text
    • http://techbico.vn/uploads/image/files/tupivesidivosemi.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/dirunis.pdfIn PDF document text
    • http://greenfuturevietnam.com/Upload/files/jirifigofadavokevusibaz.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/161409785f0734---lifotuzuduxubaxotefetoj.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210906164818.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/wutumojepalifiluvuron.pdfIn PDF document text
    • 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_off0000acc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACC2 15032 bytes
SHA-256: 6661e103aa191d7152b49d100b16697ea39caa86b7c117182df8c7bf8bb9ac67
font_01_sfnt_off0000d223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD223 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3A 10328 bytes
SHA-256: 85fa36aa7cdedb11714efe02b4271f11e6d663969ef26147f142ffa2f21baae6