Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b2403ae88d880c…

MALICIOUS

PDF

70.7 KB Created: 2021-09-17 09:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ba1f1ef849973805a273806758bf4feb SHA-1: 7c78b05a4eac69887bb14259b6d7e7f47e32ae73 SHA-256: 90b2403ae88d880cc8db4aae582e3d5e9a22d4efdc675c295b2b79759ee245d7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of external URIs and link farm heuristics strongly suggests an intent to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

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
  • 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
  • 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://ketchas.ru/uplcv?utm_term=gt+racing+2+download PDF link annotation
    • https://speculatio.in/userfiles/file/rusonudev.pdfIn PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/kusivanimowubosunep.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/foberowuna.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/55752720064.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/4dkvk5lfkulqbdeu7grdmso1rr/54749511210.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/radaketutelizonuxu.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/zoxoribe.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/72793407080.pdfIn PDF document text
    • https://irantruck.ir/data/file/javuvimijigogonefojosem.pdfIn PDF document text
    • https://partetesal.ir/data/file/gunora.pdfIn PDF document text
    • http://polletnv.be/uploads/files/16857432675.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/gojajojomozumesa.pdfIn PDF document text
    • http://evola.it/userfiles/files/nesewanafavolaziduwedaw.pdfIn PDF document text
    • https://matao.ro/app/webroot/files/userfiles/files/kakateninoziz.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc4047ae22---jifemabawu.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/nonidibezodizezerodur.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/zexapajedeladonewejut.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/da67eaa0ef2710fc85f9b7c3e5217365/13402842596.pdfIn PDF document text
    • http://pedraferro.com/files/files/waroteka.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/93649456249.pdfIn PDF document text
    • http://chenruichem.com/upload/files/barapapavuru.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/86720207841.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/zisil.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/22264236520.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/45576930113.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/fudaxujolirima.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC859 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 16624 bytes
SHA-256: 16fb7d6fc093f80fd1ef961b920b1b524b52ad9ce2b538ec2a372ce43e1a5857

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