Malicious PDF — malware analysis report

Static analysis result for SHA-256 250080745e032b52…

MALICIOUS

PDF

75.2 KB Created: 2021-09-19 11:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e36429cb0fcbe346e7284bfcaa7ea16e SHA-1: 207cf27e8675ab4222421009a01d2bbc6876ac14 SHA-256: 250080745e032b521dc2d34fe5508b2e22fb21da795d0319f38b18d8749ca4ed
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is designed to host numerous links on disposable domains, likely to distribute malware or phish for credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://ashleymongolia.mn/uploads/files/vipatodopemuj.pdf In PDF document text
    • http://ecme.site/2015/vat/upload/files/20263793498.pdfIn PDF document text
    • http://pegastelco.com/pictures/files/43401360960.pdfIn PDF document text
    • http://www.tecnobor.com/ckfinder/userfiles/files/sitajijenogosodusefo.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/wemurawutezetoz.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/balogujujida.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/82579844242.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/pexulamolowifem.pdfIn PDF document text
    • http://poiskvod.ru/images/file/51494471770.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/sipuxatebawofibugojo.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/livaguzatelupofulumexe.pdfIn PDF document text
    • http://myslizdrave.com/soubory/bosarorabesijibanidopibu.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/99198873360.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/setulofudiza.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/wufotezu.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/lekotufifiduburasowilesu.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/18511504756.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/dj6htgh6rmumcr5q0pas4frl2e/26263624963.pdfIn PDF document text
    • http://aromata.ru/upload/files/wowedepovagetilugos.pdfIn PDF document text
    • http://cascad-trans.ru/files/wumusogisofabusukotonix.pdfIn PDF document text
    • http://93564497.com/userfiles/71204612035.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2951ad4ea---81297372853.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/jabuxojapijob.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/12191015897.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/90413238755.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/42698655412.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=call+of+duty+mobile+mod+menu+android+apkPDF 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_off0000c084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC084 10968 bytes
SHA-256: 2c22fe610944d2919cfa750c8e9f422f5d468cb3794722fbf642f368fc1c27f8
font_01_sfnt_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 17192 bytes
SHA-256: 6de390507331a63f690c7c42e86ee3186f67ad3b5451ff589ac7c28030e8791b
font_02_sfnt_off00010693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10693 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1