Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b34462a03008246…

MALICIOUS

PDF

85.6 KB Created: 2021-09-13 06:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 273a36c94bc22908dd42504f06f655e2 SHA-1: eb56f8120fbde1390a0e1aca0a8755a3dee9010e SHA-256: 8b34462a03008246d3f3bbaf429bb559dea7843eb9db7a2de6db78917b587793
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites, including those hosted on WordPress upload storage. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/hcklhaofaruvig4aeittak3ep1/xekixezemigala.pdf In PDF document text
    • http://sangjeom.com/userfiles/file///31093064530.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/kazudot.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/25744577663.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/jenuvugosokeduganonaf.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109091449141580.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613e93ccb073e---40605476369.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/bubezepimiw.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210902105613279.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/xopumeg.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/mevemabatavamuratute.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/nikuzetavelifititutedepo.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/31655281672.pdfIn PDF document text
    • https://quangcaonoithatgiahung.com/admin/webroot/upload/image/files/27986766600.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/47053180142.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/f1cjiv8fkh3j97cq53tan470j6/83625587350.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/fedijofosawebaberu.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/14969706076.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf8d7079a3---52918650760.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/nutoteronejemukomosafevi.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/veposojivipemanapepamixud.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/65711429931.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/22854550221.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/67925705093.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/56399653968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=viber+old+version+downloadPDF 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_off0000eacf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACF 10404 bytes
SHA-256: a3dd77f5044010a72b0973d0ddcd76472f669e902a9a53fde9e57264e2e65d6c
font_01_sfnt_off0001027e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A90 17804 bytes
SHA-256: c3ed8eb289489af73d7f1a06d80779ec7c49805c2b30cb06ba529ea0c080b8f6

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