Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8e76adfb270ad1…

MALICIOUS

PDF

87.4 KB Created: 2021-06-17 21:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: abbc4576096d69bd585b83c638c4a4cc SHA-1: 50cb6a5a033468e3d29c55265bdfe8358582a716 SHA-256: ea8e76adfb270ad1cab3f7e5e74453157cfd08dbc86d239a0328a7519e0d8b64
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089e7ed382cb---82613280724.pdf In PDF document text
    • https://tarzminder.com/resimler/files/sawej.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/c6def8d04695792219d5cb497ebb03b1/8611061326.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/14561249233.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/15216324419.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/15893795458.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1bd9cfee8---dudogiregijadusiwelifib.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbdadbd663---36709992599.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/jokejonoto.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/db186f5ced2abe16b4fe6d22cf0326c8/kakape.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/d1336820e15808854eabc94a89a9ead2/55176582131.pdfIn PDF document text
    • https://areicon.com/images/file/gufekadido.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b16daf4d42a---88525440757.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02fbdc07c0---gewiladegaki.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/sabuk.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/bc5ce13142a879e087fac7e5c5514993/ruzolafuvenikegezesonib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=kuch+rang+pyar+ke+aise+bhi+all+song+downloadPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE42 5700 bytes
SHA-256: 06920978fb049865b1dbcd90e669a24df34eef8f43c5324bc8a8847a8df64551
font_01_sfnt_off000101b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 10996 bytes
SHA-256: 8976ecf0a13781a5cf0c7ee3b242810d41d4fbaf685df8ca97fe3ec2eac5f3d6
font_02_sfnt_off00012712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12712 17352 bytes
SHA-256: a2c21c22572722ad3196b6bad527cdb99e69ded8ad818d3c32b38de3cd77a3b9
font_03_sfnt_off000140c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C9 3884 bytes
SHA-256: 31664c6e3d069ce92947a5a8d1232e9f74d2f06b15632351f18b7e0b46900f6b

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