Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be2ddc0c0989f4a…

MALICIOUS

PDF

80.8 KB Created: 2021-09-03 04:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3d38fbe8c4d7656e952bfe47ccccc790 SHA-1: 4f18f2fbe6f80e8527dd5b2c843a95bc2d801ca6 SHA-256: 0be2ddc0c0989f4a9d255c75258e8d2fccba6be40e18a555456777a91a04da93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading further payloads or visiting malicious sites. No scripts were extracted, but the heuristic findings point to a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://rgjbreunion.com/clients/6/69/6950e03db8b1ea894755b369f0a03c31/File/590756770.pdf In PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d6abc2c53---26932759208.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/fb1e43ed272879d2509cfcbb72459484/wisisebesuveror.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c35e8ea1a8d---26337930717.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/relofuxakowuse.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021051612203039.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607055434a00e---rireniforokawemisizadubu.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/79545788874.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/99386219047.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/fiv7172vlu2osm1cfuh5q0pk1v/6598232281.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/b54b80d2268f353664e4055f937a2b59/felozaxuj.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/aa93f90dd83fcf2fcfd7469584d7aca8/87169736436.pdfIn PDF document text
    • https://digireg.dk/upload/38593551878.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d5f7a48890c---topupebare.pdfIn PDF document text
    • https://nhahangphongcanh.com/uploads/files/99611222846.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7beb6305a7---44984566408.pdfIn PDF document text
    • http://riversreunion.org/clients/8699/File/43462903864.pdfIn PDF document text
    • https://artbynela.com/uploads/file/pegerasozido.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/sejupojuwa.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c6115ec36aa---31526720722.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/dfb2267aabd0c03e4c5c679e02f860d2/43124365200.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/17456342043.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/lunezoposikonujo.pdfIn PDF document text
    • http://vaynhe.com/upload/files/79099083257.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/tirelinekotejemeragez.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/1935244095.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16096e1e80060e---13063114209.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=adobe+pdf+reader+for+windows+xp+32+bitPDF 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_off0000d560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD560 11044 bytes
SHA-256: f284036b39f03c6ea76ae242d4983309cfdee15d82239e7e14ddb67863c62eb1
font_01_sfnt_off0000ef22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF22 17876 bytes
SHA-256: 85487648e2c964f7224cbc7c0f570e35a8ea3ee11a34306b9cf286baf8b57869
font_02_sfnt_off00011d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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