Malicious PDF — malware analysis report

Static analysis result for SHA-256 311534e96975c07b…

MALICIOUS

PDF

87.5 KB Created: 2021-07-20 09:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 00c18f3a21dcd222b91075090b4677a9 SHA-1: 4f0df8150c0f3d9d30402db2dea649022a8a3cd6 SHA-256: 311534e96975c07bab2d3c410d10ddc188548fc3052b2bbff675046305505fcc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress uploads and disposable hosting. These links likely serve as a link farm to obscure the ultimate destination and potentially deliver further malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/742f08c177b9136f8290f0e253927cf0/93611713040.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/52567725411.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/xutedavexigilubewuluf.pdfIn PDF document text
    • https://techlan.pl/files/file/kojowejonebopesonomat.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/32870898696.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160abd7e800438---81711019411.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755f083106c---72380586798.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/t2gait5gdq5gen9acll8ph690r/gebuwuxojarenipopaxobik.pdfIn PDF document text
    • https://mides.vn/images/ckeditor/files/kutepex.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d48723593---94995535538.pdfIn PDF document text
    • https://tekartltd.com/upload/files/82653870958.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b8f16a2e7---tenijogugorug.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/jefafilojuvupuku.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/3661f5fa682b294719dd11bc76ee67c9/16686021422.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/gotexozus.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/85a7b1e8873837311c63a283cb0e8d61/71951422413.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/c2704732f4d22f094d879fdc0159b8d5/2352312635.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b230d02ee60---fosemaferisixat.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/10761909252.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/fabedudu.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/62390545382.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+long+to+cook+9+bagel+bites+in+microwavePDF link annotation
    • https://mediacentre.heathrow.com/js/ckfinder/userfiles/files/dilewiju.pdfIn PDF document text
    • 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_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 17972 bytes
SHA-256: d5f78cbb77e882390a375d44493254b4ad050184432833d1e2715cd933f5e94e
font_01_sfnt_off00011ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCF 11116 bytes
SHA-256: b42590ebaa744427a1d817ec72f59a8094bd4fe488b0d810e734196426f59ab8
font_02_sfnt_off000136d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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