Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ce5421e9986fc66…

MALICIOUS

PDF

88.6 KB Created: 2021-09-13 15:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f0f2b68582e69ff88c5ac8b6edcfc9c7 SHA-1: b465b12bcc011ac1153f014a23bd034ba4f76b1b SHA-256: 5ce5421e9986fc667cba9d16be3d6cd6258cd8559d34463247028e8d680374ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm directing to multiple domains, many of which are hosted on disposable or compromised infrastructure, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to exploiting PDF vulnerabilities to redirect users. The presence of numerous external URIs and link farms points towards a tactic of overwhelming the user with choices, increasing the chance of a click on a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://silverstonedevelopments.com/ckfinder/userfiles/files/xowitenejigo.pdf In PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/bowabomowu.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/97iu7gumlf77f0rc238n8h7da5/luzajasedilovizivobomasaj.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/44027513687.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612f466344c74---27720855027.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/valumakevaronukurij.pdfIn PDF document text
    • https://sanidom.pl/img/file/34289236887.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/161336fb4468c2---pivesogarow.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/zutelolixixuxoj.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/5dda368d3a5a37b602d4d521be21cf76/13665109994.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/43607638449.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/f7ceaf7622bd04478efe51ba28aae103/gebinib.pdfIn PDF document text
    • http://izmirtavla.com/upload/file/volalisunufikivimevibak.pdfIn PDF document text
    • http://aa-nusd.jp/84365499663.pdfIn PDF document text
    • http://www.jasolasia.com/image/upload/File/54144411318.pdfIn PDF document text
    • http://iucecb.com/files/file/gakonipoxurepojatanolume.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161377c1c13da3---31062368482.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109121132214962.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/12728066367.pdfIn PDF document text
    • http://studiotecnicobonoli.com/userfiles/files/51339814265.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/36399848706.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/juwetivuwuvolitunuwulisen.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/bepevevunur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=f9+movie+watch+online+freePDF link annotation
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/torolowoke.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_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 10732 bytes
SHA-256: 8bd653e939793af187dcc278467eb9d9487dd27ef30fb655ed6ac5c16f90b8a7
font_01_sfnt_off00010f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12784 17596 bytes
SHA-256: d365c3ab73ac159425f022b964ab2d95b9f49ad2424c59980ec8bef2429fc531

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