Malicious PDF — malware analysis report

Static analysis result for SHA-256 5489e62e6e8fa7bf…

MALICIOUS

PDF

81.9 KB Created: 2021-09-14 03:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8e4c322815c7a504a20280c26c0507fc SHA-1: dc236012f3c7ec315c027427d96629f02204a9d6 SHA-256: 5489e62e6e8fa7bff6fa1c993f0fd1596abe4c76739fff8f26298e7ca551a73e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm with numerous disposable URLs, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the document's structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://spandoekland.nl/userfiles/file/81796670768.pdf In PDF document text
    • http://etpatatietpatata.com/userfiles/files/jajamunurifusoneru.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/tifigasugepalexijide.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/timamesininofevud.pdfIn PDF document text
    • https://glozor.com/userfiles/file/18551345658.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/45963677335.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/95546945800.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/wabesukaberexilogusi.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/kugagitumabiveza.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/072eba675b913df63554bd20933d67ec/tavasileponidow.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/fijok.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/21796888809.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/46967656744.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a66dbdfaea---fumagagitekamesusagoliv.pdfIn PDF document text
    • http://abwingssuffolk2.com/uploads/files/kojubovipekigovame.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/zixelamoku.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/juzukadafeveloxop.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/71191489931.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/jorokapubinifiborakekiniz.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/pikaze.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/96879304057.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/26645082170.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=wallpaper+for+android+2021PDF 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_off0000de60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE60 16956 bytes
SHA-256: 7c7dd6333406f1e6c43b7067b588d0c01ee56a89aba606b05e005af33db00ba1
font_01_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001225b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1225B 10512 bytes
SHA-256: 29eaef260815e0223db9a7cc6d498d377b2a20dc009f37a31f11338d9edb72b0

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