Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc98ee9fd0b701d…

MALICIOUS

PDF

75.4 KB Created: 2021-09-13 00:48:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 55f8c81b9660b37807beb8a5ca7cbd2c SHA-1: 06a5c804f468067a724b9f31d49b03d482f3510d SHA-256: 2fc98ee9fd0b701d5d4a8bafe391ab961f45f344c531ff18d5a324e9871493aa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a strong likelihood of this document being used as a lure to redirect users to malicious sites. The embedded JavaScript is likely used to facilitate these redirects or further obfuscate the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.acta-mobilier.fr/ckfinder/userfiles/files/merokadofozelojega.pdf In PDF document text
    • https://vmwarts.com/ecovic/file/9469794061.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f05d0e5f1c---33919037053.pdfIn PDF document text
    • http://greensketch.in/userfiles/file/fadusowatewigigiwefatiwuz.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210908_0134850329834D83.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/861556858.pdfIn PDF document text
    • http://albarossa.jp/js/upload/files/duwekexedabi.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/77142254231.pdfIn PDF document text
    • https://portecitadelle.portecitadelle.ca/ckfinder/userfiles/files/90981798865.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/lozubinireti.pdfIn PDF document text
    • http://www.rsvpcatering-ar.com/files/imagesfile/20119757099.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d1b803379---fesijukisazi.pdfIn PDF document text
    • http://vektor28.ru/userfiles/file/rozobimamipezuzizani.pdfIn PDF document text
    • http://matrix-corporation.com/upfiles/editor/files/39566056076.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/1142822217.pdfIn PDF document text
    • https://breedlife.com/upload/files/54502090881.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/buguzowizusadugenawefobeb.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/30991805469.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/7463aeb75b857b9f41db555abf2f2d19/xijazeroka.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/wajer.pdfIn PDF document text
    • https://smsenerji.com/resimler/files/9254573256.pdfIn PDF document text
    • http://ux-school.ru/files/files/33079997124.pdfIn PDF document text
    • http://creationart.hu/files/file/sowikofa.pdfIn PDF document text
    • https://strongpointmarketing.net/userfiles/file/32628777806.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/65909074335.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612efe15e8c3c---68354492332.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=mia+katy+evans+pdfPDF 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_off0000c25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC25F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA76 10488 bytes
SHA-256: 4dd15c1bf666af1182022f43bef649a56d133e35f8447a42ebc97aee01bf476e
font_02_sfnt_off0000f278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF278 17524 bytes
SHA-256: 6d94146f0e90df6a9483cdaf08ff53b8be78c443a010839e1a61ea249e9f9bf4