Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37f25de015d844a…

MALICIOUS

PDF

82.0 KB Created: 2021-09-05 04:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c7f89d08b6bbb069b3082846b828343a SHA-1: 40fdde93e0d1d8cccf0572dd3998be3ba2901a0b SHA-256: d37f25de015d844a1bb9e1c41237b007eedfa425dfad7f4e31cfce4ef24fc9cd
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and presents a deceptive 'download button' lure. The sample also links to multiple compromised websites, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of embedded JavaScript points to its use in executing malicious actions within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jobtiara.com/files/files/73967870044.pdf In PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/1k4pahnneot5tpt3v207d3rk93/45841292043.pdfIn PDF document text
    • http://tongkhomica.com/upload/files/vuwopisixatefufebufolizi.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/85365613363.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160806f0fd9f0a---pibajonosaxitupu.pdfIn PDF document text
    • http://kisito.com/userfiles/file/riporugunanu.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/571a0d3a72a8d3f9858b2523f78882ff/76616872379.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/29278470878.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/9649008393.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/25867337289.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/ruxelurivepebelajoxonuni.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/ajuni3efonr79olm625it81f7m/divajuz.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a2008de54---xitebefifolabiwose.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160dfad4f4a8e5---60690893654.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609834bceecb5---duvedepibomevefol.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/rofofolovaleluz.pdfIn PDF document text
    • http://vtaky.sk/media/file/jejaxepom.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/53189239295.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/lfsg9eovdd7k24jvu5p63r70g9/fajezebo.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/46afcbf55e9ee7bd3ddc2a2c89201334/37691965675.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/tugagatadozebeginokano.pdfIn PDF document text
    • http://clinicoral.com/img/userfiles/files/xinur.pdfIn PDF document text
    • http://teifsepahan.com/files/file/43277078731.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/36425884314.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/ripidifi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=dictionnaire+maritime+pdfPDF 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_off0000d5a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A8 10568 bytes
SHA-256: ac00e93ab56106bd74b45ccd0fb8b6b7d21395ae7e2e6739177c653f0289f172
font_01_sfnt_off0000edbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBD 19640 bytes
SHA-256: c1695090e83bfc72a0d8406f95991404f0f25a1c42df0db9045675f507bafba2
font_02_sfnt_off00012125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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