Malicious PDF — malware analysis report

Static analysis result for SHA-256 25806cd9ce4e9d4b…

MALICIOUS

PDF

78.8 KB Created: 2021-08-27 14:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f0b9a8187b3b7ddc35c8ae231dde2f42 SHA-1: 3ea842d01ba615204203715724909d06e1d52147 SHA-256: 25806cd9ce4e9d4b32c0003a19bf3a876fd5d40e06eb360125f6ef74944b4bb5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document describes changes to financial instructions, a common tactic in business email compromise scams. Multiple embedded URLs point to potentially compromised websites, suggesting an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://wooshin.kr/uploaded/file/155303331760f08dda663f1.pdf In PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/ba25646cead26c668af92a10f153f8f4/52504466354.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/vafolub.pdfIn PDF document text
    • http://camwater.org/media/files/lakuxozimafatojatapexigar.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/26eb107d4baf6687a33888084cfc30d9/59297613437.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/kexesuj.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16199096212677.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/tipijukolopade.pdfIn PDF document text
    • https://aneri12.eu/res/file/2769758416.pdfIn PDF document text
    • http://sbairs.com/datas/files/mitemazelevitetazi.pdfIn PDF document text
    • http://redactron.com/userfiles/file/69604415904.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/6qbnrokue91kdrum3j6c96fhaj/49198654443.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b05d6b8dba4---nigakebalin.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/30884770135.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/sovatodogobemene.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/dslbnl96l8jdvod5pg0d1bm3dq/jokudeto.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/67326571416.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4c618a636---2645690485.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/90347249822.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/40398876557.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/serofizuxuxuzepusenofupaj.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/80454736508.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/feredujeraruvivevisulo.pdfIn PDF document text
    • http://nhs-carpediem.com/clients/46367/File/zivagadex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=transferring+bookmarks+to+new+computerPDF 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_off0000d179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD179 15912 bytes
SHA-256: 7974acf0fb143b6f9cb31f25117ba34163c9b39ab238c8dca13f1df576439b07
font_01_sfnt_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 11160 bytes
SHA-256: 4a02b86e13e43b49305043adfbf58ec6753e190710955877348ebe12cdaabea4
font_02_sfnt_off00011465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11465 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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