Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad229f6d427596d2…

MALICIOUS

PDF

78.2 KB Created: 2021-09-21 01:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 488a387ed801ccbcb07643401d4b2308 SHA-1: bf2f8ddb9c4c607c15573027ab91c0ece18bcf7b SHA-256: ad229f6d427596d2e002019e9f41755f3abde85dbc5d5b42a2841298e90f913a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded JavaScript stream and numerous external URIs suggest an attempt to redirect users to potentially harmful websites, consistent with phishing or malware distribution tactics. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a large number of links on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • 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 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://garglob.ru/uplcv?utm_term=one+piece+stampede+eng+dub PDF link annotation
    • http://flomojapan.com/upload/files/wugutus.pdfIn PDF document text
    • https://bdata.vn/upload/files/nojugetat.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/kokitujupojajavisepe.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/15007665139.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210903222656_bjsb7b.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/6827415339.pdfIn PDF document text
    • https://zenmobile.in/jaipriyart/uploads/files/ledesubijezije.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/88612817067.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/85381424967.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/muwir.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/51752196273.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/34345421406.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/66838880179.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/36277614846.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/8f006296a198fdf0f743011c3ddee74e/nelujisix.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/geniwesiwilod.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1142e57e3---30079579209.pdfIn PDF document text
    • http://acril.ru/ufiles/files/korabizufofisulugos.pdfIn PDF document text
    • https://mollis.rs/files/nanunino.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/1745636936.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/jopigamalazawegorosumow.pdfIn PDF document text
    • https://pu-sk.com/app/templates/js/ckfinder/userfiles/files/gibepesifal.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/23993033114.pdfIn PDF document text
    • http://ser-buk.com/userfiles/file/2801602368.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://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_off0000ca8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8D 18640 bytes
SHA-256: b8f9c116c18ee20e9be71d8b5f91bf08e792988980c3f302ad7564f69186068d
font_01_sfnt_off0000fad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000112ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112ED 10856 bytes
SHA-256: 33f76130e9667d99e018c02f80f972ac18d3a973b52655b9694ce100534b9c9d

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