Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8dfa76fd865d58…

MALICIOUS

PDF

68.7 KB Created: 2021-10-03 18:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c1d1b7d99cd304730f0199b7f388a375 SHA-1: 9d4ba2f788338658abcf68abf343f1fe4ac65e63 SHA-256: bf8dfa76fd865d58283ad0d608767f55645f98cbb08d1a8b6a81304435dc7a43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm hosted on compromised WordPress sites, with several URLs pointing to such locations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or redirection to malware. No scripts were extracted, but the structure and URLs point towards a malicious document designed to lure users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614ec6ccb2666---kenasajijiviz.pdf In PDF document text
    • http://www.polni.si/Images/files/vatukumuzedudowe.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/lixanusokufagagudodu.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/supad.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/59843802600.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/9899892490.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/28477108313.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/37968621250.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/91029303190.pdfIn PDF document text
    • http://supragyn.cz/userfiles/file/56783402416.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/45182605478.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/87570811903.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/b74ec2641ec14866e085663b564ade1e/32926182241.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161544fa19f5af---22419474826.pdfIn PDF document text
    • http://paglialonga.it/userfiles/files/34477009098.pdfIn PDF document text
    • http://yuilchem.com/userData/board/file/35535210166.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/11410409581.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614822526fc1e---25311010895.pdfIn PDF document text
    • http://ametansk.ru/uploads2/21808716980.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/mosikedekuna.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/22729017948.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/ziwib.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/jelizamoxijekifi.pdfIn PDF document text
    • https://infosantiere.ro/userfiles/file/38152588795.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=psbd+interview+question+answerPDF 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_off0000aee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE4 10732 bytes
SHA-256: 89ba89bf00b234be38dd6b108250b2a8a23f2b8b1818274bfcc8fe93fb3ff43c
font_01_sfnt_off0000c780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC780 15004 bytes
SHA-256: 8b8b9fe924e74e4047304e662d2ec30df3682e53d741ca0c936da521a8b443b1
font_02_sfnt_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.