Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c629ae56bfdbc36…

MALICIOUS

PDF

83.8 KB Created: 2021-02-20 13:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2814c95f1b607ad03217475546c2f73a SHA-1: c4496ecfeb7e35fbcec958e34899e2cbe1912158 SHA-256: 9c629ae56bfdbc36896a4afcf8fb3fa3dc8be27e24576117476e66f797ca157a
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF link farm'. One of the primary links points to a URL that appears to be part of a phishing or SEO manipulation scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/123?utm_term=what+the+bleep+down+the+rabbit+hole+film PDF link annotation
    • https://mogudigadoto.weebly.com/uploads/1/3/2/6/132695399/sekilawemugak-tonizopejipaja-muvutevuz-pumozofiximu.pdfIn PDF document text
    • https://zaxezoxixuj.weebly.com/uploads/1/3/6/0/136097133/sewesosiwibumolofe.pdfIn PDF document text
    • https://jevebuna.weebly.com/uploads/1/3/4/5/134594548/f594e11ea3.pdfIn PDF document text
    • https://cdn.sqhk.co/nejijilo/giEnAie/43707955059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413120/normal_6026514020cec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425772/normal_5fe3a5943353b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_6025d0a0b7e89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bodajaku/48088462932.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/how_to_connect_my_iphone_to_my_home_wireless_network.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/boogaloo_regular_free_font.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/cadillacs_and_dinosaurs_apk_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/lifariguzoduzu.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/zozagowu.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/home_screen_launcher_for_android_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/gizos.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/gopowuvituxogazan.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/68907945098.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10661 5348 bytes
SHA-256: 1573467dd5c323996e9c099d129cc41ceec8b3170237b1e73dfd9221d261cc76
font_01_sfnt_off0001187b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187B 12488 bytes
SHA-256: 7db63ed7e5b227cba934a6464fb5a1c308396226e0d6e15ec35683e122c165ee

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