Malicious PDF — malware analysis report

Static analysis result for SHA-256 2032cbf69ce47b7e…

MALICIOUS

PDF

70.5 KB Created: 2021-02-20 14:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2e2c8eaa1e7ce73968bc8a4c50d32743 SHA-1: 251d8b237d61f5e84e9780f3ad280b50d8cc0f31 SHA-256: 2032cbf69ce47b7ef8ab2dcb074414899baea375754a36d9fd26cc77a90dd3c2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the presence of embedded URLs and the 'PDF_SEO_LINK_FARM' heuristic suggest the document's primary purpose is to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=bellus+3d+face+app PDF link annotation
    • https://cdn.sqhk.co/zidulibu/OPjgpgc/sudumidofuzuk.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/ggiaZhf/gun_addons_for_minecraft_bedrock.pdfIn PDF document text
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/79a3a5f9a.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/hjjgbX4/podaxanolitevadapepepezi.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/ia0ieQF/press_your_luck_contestant_theo.pdfIn PDF document text
    • http://praktika-ingenieur.com/music_worldwide_elizabeth_sharmakwveq.pdfIn PDF document text
    • https://cdn.sqhk.co/xoresarib/DjaCuFq/sibededurimikisobusogejig.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/ihjiQgd/51909437115.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/jjfgbjg/tiki_taka_barcelona_documentary.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/chjiege/80014045051.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/wuniku/kewuxokovukopugakal.pdfIn PDF document text
    • http://mokimonanogi.rf.gd/93527878961.pdfIn PDF document text
    • http://pabaxonewopux.epizy.com/bunagefevafutop.pdfIn PDF document text
    • http://pomigipasa.epizy.com/87951363241.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_off0000d76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76E 5268 bytes
SHA-256: 659bd244f6c4a2e50bb0b0e973d71ce8b3af9b3029113d7481e1bb3bbb058e36
font_01_sfnt_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 10616 bytes
SHA-256: 6455190e6891420289f7b07d772a7372e00fbaf27a5a2121f8151e4034950f63

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