Malicious PDF — malware analysis report

Static analysis result for SHA-256 675b7c48e21981b3…

MALICIOUS

PDF

79.2 KB Created: 2021-09-09 08:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 32172e070b571e7c11b60d2c7741162a SHA-1: d109c681fa87751a8cde100d3d5c0497a1d9285f SHA-256: 675b7c48e21981b3111179e6352e197438ddd7a253073e652df230f77c9b9e66
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a link farm pointing to multiple disposable hosting domains, suggesting it is designed to redirect users to malicious content or downloads. The presence of ClamAV detection and ML classification as malicious further supports this assessment. The primary attack pattern involves luring users with a fake download link, likely for a game, to a compromised or malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/a3ab7f5e4b532160468a78c17fc7a7a9/2899086982.pdf In PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/52572856788.pdfIn PDF document text
    • http://dhf-china.com/d/files/46511220521.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/36339653619.pdfIn PDF document text
    • https://fivetc.net/uploads/files/figiduduwexupiwebixeviwo.pdfIn PDF document text
    • http://mylodge-naoshima.com/24053776436.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guxaponavewuniguzedetagu.pdfIn PDF document text
    • https://advik.net/userfiles/file/4604938900.pdfIn PDF document text
    • http://domainecomps.com/documents/files/76557851300.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210903094741.pdfIn PDF document text
    • http://peaceinsrilanka.lk/ckfinder/userfiles/files/87894579427.pdfIn PDF document text
    • http://hwayoung.kr/upfile/files/fepugodinafimiwulex.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16132d13817946---2589451319.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/19799295989.pdfIn PDF document text
    • https://yantrasearch.com/ckfinder/userfiles/files/13812100753.pdfIn PDF document text
    • http://upsshop.ru/ckfinder/userfiles/files/bidetoxexal.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/42683797942.pdfIn PDF document text
    • http://acsalma.hu/userfiles/files/16765459098.pdfIn PDF document text
    • http://12shio5.com/contents/files/sisosejabanazavat.pdfIn PDF document text
    • https://izr.fr/files/68103948952.pdfIn PDF document text
    • https://phuquiland.com/upload/files/93281924679.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/161383cfdc16b0---59799005906.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=download+mobile+legend+senkiPDF 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_off0000d147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD147 17684 bytes
SHA-256: 1ed03180b65952edf17764d179b13af3cc47413ef2e0d9008e781e21218e5469
font_01_sfnt_off0000ff46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 10712 bytes
SHA-256: 1c1047fbec888cf2928ceacd140289fd02995d9f7ac2b83eb490518982ea7f8c
font_02_sfnt_off000117a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1