Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e9cea96dfa7a93…

MALICIOUS

PDF

75.6 KB Created: 2021-09-16 17:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 3b377777181376c451069c23c955c705 SHA-1: 4a1fd6b99165988670b55b88789f2f01be0d4703 SHA-256: 08e9cea96dfa7a933e65d935bd1bb58cbf2cee67e1a8736e878aff6cbad19bc2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with numerous URLs, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious content. The presence of a specific search term related to 'metamask for ios' in one of the URLs indicates a potential phishing lure for cryptocurrency users. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/aded81fc191c95ecc0c5f5c786ff227d/15557809105.pdf In PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/zadamavomigebavexutejupi.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/80440936040.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/nojubaralewirewu.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/mexaletoxazoreba.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec4e801764---fopipesagefozaz.pdfIn PDF document text
    • http://imdmotors.com/uploadfile/file/2021091410373058.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/f7b1c00bc073d20671fdd3b07538e68a/95199448727.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/68105873773.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/tolozigozafolobekabojexap.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/38789477450.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/mafedixogukovosipozo.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/21346976001.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/44793582642.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/22563262681.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/c98351d9c850bdd8886c62009531d507/35409268671.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/31723491887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=metamask+for+iosPDF 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_off0000c6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A8 17180 bytes
SHA-256: 0bf91a5afa53e40ee45e18eae01ae09558b305e8b6ca56e3ec327d5a3125ecca
font_01_sfnt_off0000f264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF264 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7B 10308 bytes
SHA-256: 5bf0d9ec568a299ae451f081c869c1e3a2e80917c3c27fcbe9f6db586ddb60fd