Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ca521581baea01…

MALICIOUS

PDF

87.9 KB Created: 2021-03-12 18:35:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f05132b745e3a7613cdd35860e0ec331 SHA-1: 9d629997fbf9fc5cf56a1d3322d929cce81e9a35 SHA-256: 59ca521581baea01e62100abd73ebe2a811f09832c937a18b621654a92d45153
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL leading to a suspicious domain that appears to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/award?keyword=adagio+piano+sheet+music+pdf PDF link annotation
    • https://vatubovelogised.weebly.com/uploads/1/3/4/3/134375195/mopirawojum.pdfIn PDF document text
    • https://zasubimivari.weebly.com/uploads/1/3/1/3/131383839/4823439.pdfIn PDF document text
    • https://cdn.sqhk.co/bulixanejad/8xUjZe6/bevebi.pdfIn PDF document text
    • https://wevenakexeg.weebly.com/uploads/1/3/1/4/131438808/gikuja.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/dudosariwoliriz_zibufiguvi_dukala.pdfIn PDF document text
    • http://bestita.space/transmission_line_theory_basicsc8n91.pdfIn PDF document text
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/kusugizuwezam.pdfIn PDF document text
    • https://viwoposiruxeduz.weebly.com/uploads/1/3/4/6/134633276/boxafitov_livod_jotitajezuxi.pdfIn PDF document text
    • https://koxidofajutu.weebly.com/uploads/1/3/5/9/135971573/79ce6c.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/p1giiuT/lastcraft_survival_mod_apk_free_craft.pdfIn PDF document text
    • http://esagafow.fun/fedefegatakuvl627p.pdfIn PDF document text
    • http://slmit.fun/4105787948953jea.pdfIn PDF document text
    • https://nelunozulugekis.weebly.com/uploads/1/3/0/7/130739970/vudugepisibile-nigagamigoz-keguw-najusilu.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/belapawerezuju/jabarisopifulezazexi.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/afspa_in_manipur.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/cdca_endo_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/con_calma_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/kane_brown_heaven_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/general_mills_india_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/70710202060.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/19566351286.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/83372948030.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/23136632173.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
    • 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_off00010786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10786 5428 bytes
SHA-256: 5436ef624257216563a95f421cb62aa718f1630b8e34be1405ace8373a57ce47
font_01_sfnt_off000119e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E5 10192 bytes
SHA-256: d9c54adad4efbfad9a80a16d55adcaed6c3bdbb17e7f4a65d27773b68363b3f8
font_02_sfnt_off00013d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D04 16100 bytes
SHA-256: d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6

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