Malicious PDF — malware analysis report

Static analysis result for SHA-256 de8c3ee8a7a30f69…

MALICIOUS

PDF

62.3 KB Created: 2021-09-24 14:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: cb29b678a7d22aac187eec6df4a4a6bf SHA-1: 627f9335671a5ba1f995ab6ec2486655b551efe6 SHA-256: de8c3ee8a7a30f69230fc67db26e34999bdcaad0077df533ebe8eb9a22558baa
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains a large number of embedded URIs, many of which point to disposable hosting, indicating a link farm designed to redirect users. The presence of external URIs and the heuristic for link farms suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4242

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 https://catamma.ru/uplcv?utm_term=how+can+you+earn+robux+for+free PDF link annotation
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210912_931B949FBE4199BA.pdfIn PDF document text
    • http://venkateshservices.com/uploads/66830834362.pdfIn PDF document text
    • http://honeycontacts.com/uploades/userfiles/file/xekikefuwoke.pdfIn PDF document text
    • https://hattoco.vn/images/ckeditor/files/fefifepebuduzarijolowe.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/vezimidagorexuvajus.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/0d2cfc91bad85638e2ba26722cfb2cbe/76890335805.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/zutubivifuvadubitowisider.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/kowezubafidozujanatom.pdfIn PDF document text
    • https://argumentua.com/i/file/86155682020.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2520097ac4a7a222872e7220f9dad361/77378824134.pdfIn PDF document text
    • http://ccsl.asia/files/sawetederuzap.pdfIn PDF document text
    • http://kxxbs.com/uploadfiles/file/a/65083748144.pdfIn PDF document text
    • http://sksound.com/userfiles/file/2275542552.pdfIn PDF document text
    • https://clubsecurite.fr/webroot/upload/files/fopiwekiminod.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/23773009558.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/suvupusulixukitonenaxezik.pdfIn PDF document text
    • https://menokatea.com/ckfinder/userfiles/files/65054997570.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/fenoparu.pdfIn PDF document text
    • http://uco-kampen.com/media/files/19854752041.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/21708970406.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/malixobov.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/25434754925.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/21990716391.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_off0000b0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DC 10456 bytes
SHA-256: d3a72fc86002be55353d7a054e3f28395317dbd6d9e260876d278dd526fa495d
font_01_sfnt_off0000c8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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