Malicious PDF — malware analysis report

Static analysis result for SHA-256 447225827304a7f7…

MALICIOUS

PDF

89.7 KB Created: 2021-09-06 13:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c1b506efef819043cf6b93d5037983b2 SHA-1: 12622c15df45bc0e8b413ac50716154dbe82c3f0 SHA-256: 447225827304a7f7eb29e4bc45ba3174a33e28e879b1c1452b98c40fd87fa313
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://sunrise-photon.com/upfiles/editor/files/52789199655.pdf In PDF document text
    • https://educationindiajournal.org/ckfinder/userfiles/files/13484310196.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610603f83557a---zofalafatufabofi.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/66528493696.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/brv40b5134gp8vqan9j8vdr99u/16467632950.pdfIn PDF document text
    • http://mesamiesdallas.org/clients/e/ee/ee8f1390623de39be1ac2b47a321719d/File/30127123312.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16096e9c3cbd70---4077568768.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021073116545660.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/95255385114.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/lumosinajem.pdfIn PDF document text
    • http://keifo.ru/ckfinder/userfiles/files/kafofejapeloneduxisa.pdfIn PDF document text
    • https://doctornhospital.com/banglanews24/editorsfiles/files/38471649307.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/55884867959.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/dr2vktivspboe7ho4mlb36nq73/31189530942.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/3qemkr4jks3e14ttdid2oa2h96/nelevupabevogifebafe.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/wizudok.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/54688433278.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160815986a26db---46693519010.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/96588836131.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/b4c80b1d4d654f174f35c7efcf1ee290/41916168521.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c459f14ad---21843309124.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=c%23+convert+excel+worksheet+to+csvPDF 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_off0000f041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF041 24428 bytes
SHA-256: 4b5529d92bf4efd1d3c7e1724aae8a8b03bf3ec7a905a181f17a7932b175642b
font_01_sfnt_off00012f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F70 9104 bytes
SHA-256: fe4a9ad32d6d12da45ce8861a1e6e511df5579fd33367a5c4d1c9e774d301804
font_02_sfnt_off00014241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14241 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.