Malicious PDF — malware analysis report

Static analysis result for SHA-256 419dee3cbbab8442…

MALICIOUS

PDF

71.2 KB Created: 2021-10-02 16:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e52226690ec7c900b7506544c1ba149c SHA-1: 6d4f1f95b753289f685ae5657b5c987c4c8ca74d SHA-256: 419dee3cbbab844243467d26651a919cf7974d2cd17838c13bbc2dbeac073078
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers flagged it as malicious. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The primary purpose appears to be directing users to a network of PDF files hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://www.ondebiz.com/userfiles/file/82628063382.pdf In PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210928_8F7EC36EDA87119E.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/tanavuza.pdfIn PDF document text
    • http://ciatic.saintelserver.com/archivos_editor/file/ridofof.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/nopefabinuk.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/82623514631.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/84520789587.pdfIn PDF document text
    • https://betsin.org/userfiles/files/89627887321.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/waxugavi.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/bejopobozedenurukepud.pdfIn PDF document text
    • https://davnosti.ru/upload/gupifike.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/54537029826.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021092905540690.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/nakudosekowikimamuwatugow.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/polexovekosezobi.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/jefasisemitof.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/27478569871.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/86267337707.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/lofebewuxipazisijugugede.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/zuzugutulutinululuwi.pdfIn PDF document text
    • http://espaciocultivarte.com/ckfinder/userfiles/files/nipadaxejusok.pdfIn PDF document text
    • http://esangsok.com/upfile/files/zapizawa.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/32148479639.pdfIn PDF document text
    • http://cachnhietcacham.vn/Images_upload/files/50746121912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=cmyk+and+rgb+colorPDF 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_off0000b3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C5 10600 bytes
SHA-256: af63b48328447c3598a8d90da086d7a41a648a81df2398bac46352e32b78e2f9
font_01_sfnt_off0000cbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CD 17144 bytes
SHA-256: d87bf07a16b158b5b2f273053a646e1e7548899458872f006a975a3bdf5cd238

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