Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5a24eb6891750c…

MALICIOUS

PDF

88.9 KB Created: 2021-08-06 18:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 196ac22b0780dec227257bae6c608304 SHA-1: 00ca8c17b97f08ea813d3f797c5e4b028a77f84e SHA-256: ec5a24eb6891750c8ba7918d37b21c54b1a170ddba7262d4b680688274235cbd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://mimpishio2bet.com/contents//files/81910230057.pdf In PDF document text
    • http://oodow.cn/upload/file/210628140407270026s2rkdi4rzz4x.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cb97bca39ae---gibutavazesa.pdfIn PDF document text
    • http://drironcat.com/images/file/8684626727.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e741ecbe643---mutulugufagutoleromawaxe.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3e5b2c7ae---jumuxoto.pdfIn PDF document text
    • https://xn--faade-mtal-p6a3a.ch/ckfinder/userfiles/files/90072804044.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/gozaxudekiwolonolimufedik.pdfIn PDF document text
    • http://thepducphat.com/upload/files/vemikujuwe.pdfIn PDF document text
    • http://pagyesa.org/userfiles/file/20210624171704.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be7c58a1a39---finilefure.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/3aee7129c6d875edde6d43e4e56afd94/lojojexi.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ee07ddd6e---92966386424.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609110767bb82---xoxagozexidesomosozifuwug.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/35301107560.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/92309268474.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/72593cb509cde13e4df76492d677633b/wugakum.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/zidekufunoreb.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/ve0u4j1i5r05o7imfuuo7lsce2/wipisadukel.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/belurigizigiv.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/84521455430.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/46827217044.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/37072598081.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/40954662045.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb27115baf---95714820661.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+clean+fujitsu+scanner+ix500PDF 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_off0000f213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF213 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A25 18404 bytes
SHA-256: 0bd03fc102c165eaa98e0d99a29f1d1a586abc8e5cad1c7beff2998c0ab75976
font_02_sfnt_off00013b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2F 10996 bytes
SHA-256: 68af088613603b1ccfbccf4a8722f65f63efe2b2fef73e0bbf95f42c150cae43

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