Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7439bdee9b5c887…

MALICIOUS

PDF

68.9 KB Created: 2021-10-10 16:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: e1e9dba0623232db5589fb5b538f94f3 SHA-1: 2ea673652e565053fe708118515b01b4fccaf081 SHA-256: b7439bdee9b5c88793382b801eb9fbc2f8e0786c97e91320ce39d5469910d262
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were extracted, the presence of many external links suggests an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5134

Heuristics 4

  • 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
  • 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://rebeccaosborne.com/uploads/goniwugeko.pdf In PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/4877348338.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/65043201627.pdfIn PDF document text
    • http://hasyo.net/files/file/gafogibir.pdfIn PDF document text
    • https://onecre.com/images/content/files/9200034537.pdfIn PDF document text
    • http://piscesappliances.com/userfiles/file/kimalo.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/31331887876.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/fimavajasujapabixezixo.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/fafevoli.pdfIn PDF document text
    • https://denis-lefebvre-services.com/fichiers/file/zipamabibosofosupevu.pdfIn PDF document text
    • https://grouptm2.com/contents/files/25121568830.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/76758396926.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/sewoliwem.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/67269054630.pdfIn PDF document text
    • https://stichtingech.org/ckfinder/userfiles/files/zupeboginefipi.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-09-17/7809946d30d94ddc56bcc165eede32e1.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161527a42e79d3---bavomukoliweja.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/dojowuxesalezexemokivu.pdfIn PDF document text
    • http://mobilahomedesign.com/userfiles/files/97227968382.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/tozizajogep.pdfIn PDF document text
    • http://axi-hohenstein.de/userfiles/file/guzevowiliweveziwe.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/wimumafedidababajodizad.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/51302816003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=the+joy+of+creation+story+mode+download+androidPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161610439244bb---81830944995.pdfIn 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_off0000bbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCF 16956 bytes
SHA-256: 38806c2c0b95c79527fc22d44f3f80f17cbdab8950318a50b3ba62143b7d60c2
font_01_sfnt_off0000e6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 11036 bytes
SHA-256: 9bd8cf2c47cfbc549fd80822afa6db769b9e643297c6a664be188efbd4452a34