Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad286bcdcea4aaa6…

MALICIOUS

PDF

89.0 KB Created: 2021-07-07 03:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 4d43de97d072fd1654c8445cf0576159 SHA-1: 0e305e4cd4488d0ed521d5af3d9df373c9866f39 SHA-256: ad286bcdcea4aaa608fa1e9ece6f3bb55c0fad3796e21395d8172376792d6db2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which are hosted on compromised WordPress sites or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for redirecting the user to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70bb98fd02---83265604020.pdf In PDF document text
    • https://mujeresenmovimientoplus.com/userfiles/file/suzivesufezirawezebita.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/d1395b0ba7a6814046a23c0900ef9357/wujetibo.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-24/20210524232042436520.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/vopejumemoxexubowanun.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210707002937.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210506003740.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/fe686eb57256ac8a05ed7d543c166034/41001796797.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1610487d4a---suzusulomasusej.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982f00ac360---31562515412.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f34f54a4f2---46837154242.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/bikalal.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608662cfb89cc---wawugirufowunitaxidu.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/9ba59e518b22bbdaf363558d6faa5f44/36096117130.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160782e56d9a00---ninofovusumojivoku.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/dfc8dce9adca47a8ab7779b25c98ec6e/gezibi.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/3716787cc8e6fdd2d4465146369180d2/52368759689.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/45142986485.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/98958969017.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/48127966813.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79959c57c---85491756310.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085c278aef1c---xasof.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/19763748088.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/39554494571.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/52ae4e9b33b8dd08979a199131352e02/41100639014.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/7469710348.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607919cc52cef---taxinemeninekikigefoba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=classification+of+wines+ihm+notesPDF link annotation
    • https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.jsIn 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_off0000f84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11066 10620 bytes
SHA-256: fcc38c5e85068dd8a9036025bee8fbbce1c50ccb8aa15c38f39e522b513ec6df
font_02_sfnt_off0001288e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288E 17788 bytes
SHA-256: d33d7f5350f395de9fa47eda52cc84f2864d05e687d6b4d119a43ed1aa04037f

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