Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d7795456d3e241…

MALICIOUS

PDF

74.6 KB Created: 2021-09-16 21:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8c4b262766e8faebae16cc055ebeff71 SHA-1: e62b9dc730a697a369624e767db32b67c03297d2 SHA-256: e0d7795456d3e2413545d05c8496e98dbbd82e5e9f1b0e8b8985f8beb791a277
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful websites. The PDF structure and embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8785

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://queure.ru/uplcv?utm_term=use+android+phone+on+pc PDF link annotation
    • http://kahasat.cz/data/file/zafuwitufozekatilozixapu.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/8503985524.pdfIn PDF document text
    • http://www.prodomasa.com/ckfinder/userfiles/files/27345114759.pdfIn PDF document text
    • https://staging-info.sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/97161431897.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/50185939337.pdfIn PDF document text
    • https://sabunwangi.com/contents/files/38731318003.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b723dc388e---54022678356.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/83879073554.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021091221463973499.pdfIn PDF document text
    • http://movediary.com/userfiles/file/naxuvikosadulatine.pdfIn PDF document text
    • http://daindnc.com/fckeditor/userfiles/file/migilukidusexixadojiw.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/jonedome.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/luxibazipe.pdfIn PDF document text
    • https://mcsfood.com/images/file/35505836855.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/riludalujivuvefag.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/91605076069.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109052148075834.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/35304492131.pdfIn PDF document text
    • https://gogift-it.com/userfiles/files/41095216576.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/54061154096.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/76cf0c32d6bc44961365830dac7463d1/lexofijubusedozepiz.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_off0000e664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE664 10476 bytes
SHA-256: 894372f3a44a6d12d43eefd42f21850a2231d39c71ec870da785c002d6e5f1d0
font_01_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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