Malicious PDF — malware analysis report

Static analysis result for SHA-256 97160482425555ae…

MALICIOUS

PDF

88.2 KB Created: 2021-09-11 20:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ce8dd592378933ebc180fa41e32df9ff SHA-1: f1a9919fbafb0526b2ebfce24880ce9113152e17 SHA-256: 97160482425555aee7f2cdc4508dd316c8ba9f2cc81ff8950cee50623d2b64a4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, characteristic of a link farm designed to obscure the final destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 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 http://phongthuydotho.vn/upload/files/96293047502.pdf In PDF document text
    • http://goldartline.ua/userfiles/file/80263843941.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/63fb583170087e995c76c6b54a520c14/7338770084.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/78852547852.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/faporunidukiguwaned.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/buxazapan.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/72887023319.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/mowarogalaxamutarag.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/posevisi.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff7b632830---40820079311.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/83750696326.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/10437269011.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/bazuzibuzakurap.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/34953799219.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/xajipora.pdfIn PDF document text
    • https://tunhuaduytan.com/upload/userfiles/files/20117562233.pdfIn PDF document text
    • http://glassick.com/userfiles/file/bazesajes.pdfIn PDF document text
    • http://sinocelltech.com/filespath/files/20210907035616.pdfIn PDF document text
    • http://vswet.ru/f/kixud.pdfIn PDF document text
    • http://gu-bo.cn/uploads/files/vorolewatalafagologafe.pdfIn PDF document text
    • http://afslab.asia/upload/files/nuvanamotesubol.pdfIn PDF document text
    • http://e-junghan.com/userData/board/file/70961533576.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/308023348.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=reacher+never+go+backPDF 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_off0000f349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 10448 bytes
SHA-256: 2892a990f3fadd3249cbb0d997b3364566ee2e40349c749c94bc82cfd901162b
font_01_sfnt_off00010aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AEE 18576 bytes
SHA-256: 6a0c40e23654b1cee6f407ca34ca009bc2b8e5242a68b10e91a95ba8021bc0bd
font_02_sfnt_off00013bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.