Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa6aecf6abe5c9b…

MALICIOUS

PDF

80.6 KB Created: 2021-09-17 16:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 513f0451bf5bba40062a178036999868 SHA-1: 748a6c760e88f461c12e59a76af5a837c04ac407 SHA-256: daa6aecf6abe5c9b65fa623dba20faae7e5c59ab13ecbb6013cffb5cfeba3329
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many pointing to compromised or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded JavaScript and a high ML classifier score further indicate malicious intent, likely for phishing or malware delivery. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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.
  • 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://cructi.ru/uplcv?utm_term=tutorial+preset+lightroom+android PDF link annotation
    • http://mardeestilos.es/fotos/file/pubafudokubudadetisuneja.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/3387457f0c3861af7c0b0364e4f91aa3/romodege.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/gosuvevexiki.pdfIn PDF document text
    • https://teamcode.net/upload/files/nemikipedatiwodi.pdfIn PDF document text
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/mewuxalosexosefe.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/xulipadake.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/44775842856.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/93174027970.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/vugekokelidebepem.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/lixosonipajog.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/88883863997.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/danawimedifipa.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/94032306284.pdfIn PDF document text
    • http://aviafond.ru/userfiles/file/69426910620.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161400ff904934---wasoz.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/73694099576.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/zajere.pdfIn PDF document text
    • http://cjpharmtech.com/upload/files/vumopusawakofaxiwenupil.pdfIn PDF document text
    • http://namngonviet.com/user-/files/34508690310.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/0buv65463106iu3snc40k1cugu/25780242077.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/kadewakozevefirojolefuna.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/32452779524.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/18608290082.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16133988756418---1056513392.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/vakezovupuz.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/448862f5baa371084567391793ab4efd/6771498994.pdfIn PDF document text
    • http://talleresjpg.es/img/file/86532551788.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_off0000d5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DC 17832 bytes
SHA-256: 08bfdae40c97a827abcf7e66a36b6621fd5eaa59edc65658f71abbd3cca1a494
font_01_sfnt_off000103bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD4 10904 bytes
SHA-256: bd2d27803cea37e0e0d2673e288e0c272c26e9f2524841f2425924bf7c626818

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