Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcb47beb48d20fa…

MALICIOUS

PDF

89.3 KB Created: 2021-09-06 09:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 876bdfc11717206782835db8aa74f9e6 SHA-1: 8fb2038b5350d310b15556c1ad4d327093f3cd30 SHA-256: 9bcb47beb48d20fa9c32e5d870c6b94dc3f635cee3d531ae5549815adc5c83ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://irlanc.ru/uplcv?utm_term=gujarat+tenancy+and+agricultural+lands+act+2015+pdf PDF link annotation
    • https://ipic.vn/userfiles/file/kadanelivetefuvojazofo.pdfIn PDF document text
    • http://land89.com/ckupload/files/wumiwugezituzidored.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/tetipomudepog.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/fb1bd7f695a2e9055833d8ec2376e5ac/84019119902.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/kerutevebifofasivelina.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f81a6856510---fasuvigikogutetibijaduxa.pdfIn PDF document text
    • https://metal-et-verre.ch/ckfinder/userfiles/files/zagezosomufolepos.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/niziluvuzokifeledi.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/sngmhjiajkg1h9dj9von4it4r6/16377457643.pdfIn PDF document text
    • https://www.geo-decouverte.com/ck/ckfinder/userfiles/files/67625307891.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/1f684ca1c9b9ecb9b81d0dbfa68dfaaa/bezujenomulesonegup.pdfIn PDF document text
    • http://fs-select.com/images/blog/file/30461285709.pdfIn PDF document text
    • https://designclarf.it/file/70546058510.pdfIn PDF document text
    • http://slovbau.sk/test/userfiles/file/sugidewubejoj.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f44d3b6c6---52464153176.pdfIn PDF document text
    • http://ymmicro.com/files/files/rixam.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b6c2e24ee---kafonetovunuwanugere.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b80806a88f8---danetadofenedewomifox.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/debifabuvigemimovib.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/donuxa.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/k54imuj4nnrr6deqb7h088e552/tupinaruzojirikozebuti.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160760d1eae928---25135268167.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_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 18360 bytes
SHA-256: 3a19daa47c070ce8bce52591c4e489c1330a0677fdc1fef2c1a6ccf024f4825d
font_01_sfnt_off00012445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12445 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C5C 11484 bytes
SHA-256: 4909d2d44e9e52b0de1264c44b7f47c6a7ccd26cb1d927facc9a85d5e172c30d

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