Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0b96d6ee8f31e43…

MALICIOUS

PDF

69.0 KB Created: 2021-09-23 08:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 15d4148a33d9f4d8bf9278bacc906cee SHA-1: 4acebc20a6d54d6bd4c3a03f3c73bc9cd9bbe176 SHA-256: d0b96d6ee8f31e4350d7ff33d94d6e6958f17686b973c1418ba5e33bd11c7937
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to multiple compromised CMS upload locations and disposable hosting, suggesting it's used for phishing or malware distribution. The embedded URLs and the nature of the heuristics strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://laborke.ru/uplcv?utm_term=darker+shade+of+elise+full+movie+online PDF link annotation
    • https://camphacement.vn/upload/files/simanerukunoxo.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/vusanijugugetevovoropedaw.pdfIn PDF document text
    • http://sql110.com/pic/vemifubewesegoreluki.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/94884330903.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/dirimu.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613198037eb77---gugetegolafukojinasib.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/64623829091.pdfIn PDF document text
    • http://gibisch.info/files/files/motebewulirurepebalozuto.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/27064935227.pdfIn PDF document text
    • http://baheth24cars.com/ckfinder/userfiles/files/54608159267.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161373c55a4efd---90460474895.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/83114475742.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/xasanikexuxaripivukugumom.pdfIn PDF document text
    • http://symbolfoods.com/files/file///gavitadodimeduxut.pdfIn PDF document text
    • http://braghieriarchitettura.com/userfiles/files/winowowa.pdfIn PDF document text
    • http://didula.ru/img/file/fulupob.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109081612134306.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/nozitigokijajegixoxet.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/puxavekekibawatadatapezo.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/jj7vsh3cmot8hu5kp59eo200c4/xiboxibanokoma.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/31104229531.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1612f81652b734---63585950863.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/fomatam.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/pewulazebibukarituxovaxeg.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/mofej.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/19744850593.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_off0000b0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DE 14512 bytes
SHA-256: 2d224c3b75dc8a58280efb0186e7b1db2506bb195b91a6fd526d5b48e46f5f2c
font_01_sfnt_off0000d548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD548 10780 bytes
SHA-256: e3309c1883dc4b3b0f8b5b131a370fd2b6a160fff331353d35152f36e3bf956e
font_02_sfnt_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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