Malicious PDF — malware analysis report

Static analysis result for SHA-256 e086e14274e17b2d…

MALICIOUS

PDF

73.1 KB Created: 2021-09-02 02:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a1fadeab5e940d7afb10e56fa4d99eeb SHA-1: be351c26b387dcc3807cfeaca9b0177b35d08eb9 SHA-256: e086e14274e17b2ddd9aeb477917b97dc5deec5a2c74bb73b8cf56a423dd4f57
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution campaign. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://wastran.ru/uplcv?utm_term=isolated+systolic+htn PDF link annotation
    • https://cambodiadriverservice.com/userfiles/file/zugesuzusimavif.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/15709324514.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/20064084207.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608792e6d479c---91108778765.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/24564436624.pdfIn PDF document text
    • https://energiadirect.pl/application/resources/ckfinder/userfiles/files/37195747939.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9135e8f8d1---gagogepovatakonomedi.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d234c1e526d---tununaseben.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f1a71054c---53954103535.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da566735155---19274884522.pdfIn PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rugakidusujuvifulejulavew.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4192eb917---rebiv.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/lhrbk6mfhevqhhbe3qcllr2mu5/wadixebedirujajebiv.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1611fbf4238343---9518288731.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607de251aba51---daporefimimos.pdfIn PDF document text
    • http://shs1977reunion.com/clients/41590/File/4402375089.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/nlhfc19ult6540cndm8q281rn6/97717245175.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd49767a174---vigiwel.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/23191995466.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/nifuzevareseborevimodevi.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/jewapoguwupejun.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_off0000bdc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC4 16124 bytes
SHA-256: 0df28e1d90e67322d57b512f8b98afeafe8a69d313fddeea7e32048c222effb9
font_01_sfnt_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 10432 bytes
SHA-256: 605bc9a677452436769df5004d5a9f0c59ca908ccf632f0fabce1afc81b0533b
font_02_sfnt_off0000fe65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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