Malicious PDF — malware analysis report

Static analysis result for SHA-256 2905a7c5869f3cc5…

MALICIOUS

PDF

91.3 KB Created: 2021-09-16 19:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 5818a8405c2566cc292ff98ab3f46822 SHA-1: 824871f1652a2da5a52e4302786aaf53af4117a9 SHA-256: 2905a7c5869f3cc579bb66c334327c4405491bf766ea486422742722210529e3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded links pointing to various domains, characteristic of a link farm designed to obscure the final malicious destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://hargagila.com/uploads/image/files/53487004330.pdf In PDF document text
    • http://slstudio.it/userfiles/files/50528986713.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/gigibejagole.pdfIn PDF document text
    • http://zuche0551.com/upload/file/7682322898.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/joxeteni.pdfIn PDF document text
    • https://led7.ru/file/87675016346.pdfIn PDF document text
    • http://hhsmelt.com/upload/files/rukalenapivozovize.pdfIn PDF document text
    • http://soskuwait.com/outscapes/admin/ckeditor/uploads/ck/files/gebupirub.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/gidomekisavigined.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/64047328261.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/tuzese.pdfIn PDF document text
    • https://mgc.to/sites/web/upload/files/xagefejemaz.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/duziv.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/94516983185.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/lokatasu.pdfIn PDF document text
    • http://viviapalermo.com/userfiles/files/xebaduzowezesi.pdfIn PDF document text
    • https://saptabangunmanunggal.com/indomobils/upload/file/70235818705.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/fixazojitiremanobami.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/kelusupisawitezasix.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/34413724891.pdfIn PDF document text
    • https://siliconautomation.com/userfiles/file/zelapisi.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/fisutakazanefaxabekewid.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161424780a19c8---jalotasiwabojo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=final+fantasy+3+psp+cheatsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 10620 bytes
SHA-256: a1e00f71d6f06d58c80ac310164710eefa5311aa62a1eed2ece19562a38647fe
font_01_sfnt_off000100c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C2 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_02_sfnt_off000116b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC2 18448 bytes
SHA-256: e64ea613b305afef2f4d38a6b4177f80976358abb0bbcf866224bf8e32b04576

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