Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6099efd7a295b9b…

MALICIOUS

PDF

68.3 KB Created: 2021-09-29 05:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bb04dc72a5967c9a1782265033f3bd28 SHA-1: 1db9fa115b12e03705f8a97644588d5850edd6c9 SHA-256: e6099efd7a295b9b0880e4446403f3dba9f5959411f92a4a6bbf03f675f42264
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ClamAV and an ML classifier. It functions as a screenshot lure, presenting an image to the user while hiding clickable links. The document contains numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://oniceh.ru/uplcv?utm_term=watch+jumanji+online+free+123 PDF link annotation
    • http://oaklandscreche.ie/userfiles/files/96317677889.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/14586192218.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/7c6ef6b04af4b3aabb6374434ce87f65/84496293234.pdfIn PDF document text
    • http://kesifveotesi.com/files/wasivuwas.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/josobobisifozogelagele.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/28914750035.pdfIn PDF document text
    • http://sivam.pl/files/file/4195920950.pdfIn PDF document text
    • https://pastijptoto.com/contents/files/lumesawunajov.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/20111655963.pdfIn PDF document text
    • https://e-midas.ro/files/file/25337501806.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/gugapunebibipirovuxokobe.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/56255281449.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/golabuwigo.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/waxilireg.pdfIn PDF document text
    • https://alpasol.e-giant.net/upload/files/gimazafalikululiros.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/32420423232.pdfIn PDF document text
    • http://songdolandmarkcity.com/userfiles/file/kopaxixijopiti.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/52211966987.pdfIn PDF document text
    • http://sinoorchids.com/image/file/52269625226.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/ec5eedf9e368fa3f3f99c33e94add839/60686955178.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1631476582.pdfIn PDF document text
    • https://lapakunited.com/contents/files/dixuwa.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/29f84a6e547c7d9108d8da3860ed11c4/vamifeb.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_off0000ac39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC39 14644 bytes
SHA-256: 22ae629b8261fed0bca477df614d0498b72e0ccf136365fd2b3fb1a7cb60a376
font_01_sfnt_off0000d0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B9 11000 bytes
SHA-256: 65c096b13191cd7e9d6f394bd03e174b1a5c66020b78e5ad0a39376efb52efe4

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