Malicious PDF — malware analysis report

Static analysis result for SHA-256 989feda02e311b09…

MALICIOUS

PDF

72.0 KB Created: 2021-09-26 05:24:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: cc796e3c587bc83ffbe38e64bd76b43d SHA-1: d11960501df5987e99f41496c0dce3c3072527e3 SHA-256: 989feda02e311b09c8676184323ff8c23ad90e845545a04814bdef094c5237fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various domains, many of which are hosted on disposable or compromised platforms, indicating a link farm designed to obscure the final malicious destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

Heuristics 6

  • 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.
  • 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://ptichile.cl/userfiles/file/lawogugowasebivoruwakugu.pdf In PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/jonegidagezududinelixel.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/bebexufikijugasatawosop.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/rasupudibipemugunafoviw.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/jivavup.pdfIn PDF document text
    • http://letsfinal.com/userfiles/file/sofapawoxorog.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161391032dcb79---1068017600.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/sabatorobux.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/13853305557.pdfIn PDF document text
    • https://taxfirma.com/userfiles/file/47208755567.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/46787012729.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/48692723260.pdfIn PDF document text
    • http://texmet.pl/userimages/file/50780107077.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/xiratizofunolafetutesebum.pdfIn PDF document text
    • https://futurefacesnyc.com/uploads/file/pasofa.pdfIn PDF document text
    • http://www.agenbenangbandung.net/file/nekipetokipobumomaz.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/fudivesume.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/58254eeee94f8877c5349b25cb6a4160/886902878.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/20219171114525806.pdfIn PDF document text
    • https://anne-berger.de/sites/anne-berger.de/files/fkcfile/51880759753.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/21384025356.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/dizukegadorewobixaj.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/kipagaguwisejinetubuzax.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612f15c07129e---fakizo.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/diloribifesikazu.pdfIn PDF document text
    • https://marblobaths.com/app/webroot/img/files/52253575714.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=android+deleted+contactsPDF 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_off0000b768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB768 17148 bytes
SHA-256: e72f35794f3dc413e1ab08bbde5517160eec5339e810351d49a6efb3cce29f7b
font_01_sfnt_off0000e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 10344 bytes
SHA-256: 48f1e0523180b3b104da86d33619cb4721cba77d68673631305b21738a0f5283
font_02_sfnt_off0000fa42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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