Malicious PDF — malware analysis report

Static analysis result for SHA-256 495550f99c69be04…

MALICIOUS

PDF

73.1 KB Created: 2021-09-19 19:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a9ed85930d7cecc3876537a5c7e2096e SHA-1: 96a716e1b5125240bb840b53ec049d910a3230c7 SHA-256: 495550f99c69be04d39d8fc47d32cadeca8126cb97307288188d4ca09d7f0b9b
126 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 heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs point to suspicious domains, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 https://synerhu.ru/uplcv?utm_term=world+no+1+pc+game+2020 PDF link annotation
    • http://aloisiquadri.it/userfiles/files/22943671711.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/22826336392.pdfIn PDF document text
    • http://cudicio.it/images/file/61814702375.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/14969904905.pdfIn PDF document text
    • http://deauville.ru/files/file/49791443071.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/8e006d1fe3593148152a184a5575303a/xekumufujo.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/nedadexewabiwajuwagidam.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/jaxinuwojegema.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/27952620268.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/fapifejat.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109092332231367.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/65653699375.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138daed7bc06---6336577892.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/19649541790.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/zibivukikegos.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109181054481002.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/40328909086.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/labusulivorimipamij.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/76900193794.pdfIn PDF document text
    • http://diennuocdanang.com/uploads/image/files/95000202462.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/6243474743.pdfIn PDF document text
    • https://flyags.com/editorResources/file///wamejagezowalikozesudado.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_off0000b913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB913 17544 bytes
SHA-256: 239466af6800c500576adfc40e58d8d4febc6a0c34f036dd78642aa15635704e
font_01_sfnt_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 10784 bytes
SHA-256: 8a7bec046cfdeacf3d907fa0604499dcf138c8da1bc738e9b9073ed8d0986f8a
font_02_sfnt_off0000ff33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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