Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d187a281a2aee0…

MALICIOUS

PDF

79.6 KB Created: 2021-10-19 05:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 454932ba521ccd6b138f452445a4a0af SHA-1: 944869b3911dfb6d03dce8b6622707028c087a6b SHA-256: 79d187a281a2aee012fb362b8438336141fc70dbc04c9d2cf5fd8198cc43da3c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to potentially malicious or unknown domains, suggesting it functions as a link farm to distribute phishing content or further malware. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a high number of links on disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://indiantalentjunction.com/milan/media/2043370506.pdf In PDF document text
    • http://flyingkirin.com/uploadfiles/file/051006168242.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/75169776974.pdfIn PDF document text
    • https://zohopin.com/calisma2/files/uploads/30245989993.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/a28f401b10fdf947215e23ab5b97d4f0/gofenewitaloduvefadinido.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/21853771924.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/gutatulubupufu.pdfIn PDF document text
    • http://voyagevietnamlaos.com/hinhanh/file/30869563604.pdfIn PDF document text
    • https://urology-andrology.com/userfiles/file/94375640960.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/10/19/file/zined.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/gogejosuxuwab.pdfIn PDF document text
    • http://hatdesechia.com/storage/ckfinder/files/84824946732.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/wixifenumir.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/tatidi.pdfIn PDF document text
    • https://footballsod.com/images/ck-uploads/files/29939631129.pdfIn PDF document text
    • http://astprom.ru/sites/default/files/file/fusupod.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/5212481497.pdfIn PDF document text
    • http://abwnickersonplaza.com/uploads/files/82805638539.pdfIn PDF document text
    • http://www.perlodrink.com/documents/38856828504.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/6edf4a92c8d6028ca60b618e28c877ff/resuva.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/6Zflnl449io/uplcv?utm_term=how+to+reset+ink+absorber+full+canon+g2000PDF 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_off0000d043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD043 18088 bytes
SHA-256: a9103b0d5aa2461c0dbcdc9473735eda34da286bc4e7daaf9dfb5ddffbc3fdc0
font_01_sfnt_off0000fe50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011667.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11667 11160 bytes
SHA-256: c2f10755e0c7ebb62c2ee79b83ebdc74b0f25e7a99dcf982691d4463a99a02d4

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