Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e874a69d283bee…

MALICIOUS

PDF

62.3 KB Created: 2021-09-29 08:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4f28cc2acdf01fafaf08488ddfe613e8 SHA-1: 79f342e95ab3e4c718fdef557564b7d229c56dd0 SHA-256: 60e874a69d283bee5686e1c1ffd04b70dd1360d0fadc96c0c5bac7d109eabcd8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a network of links on disposable hosting, likely to distribute malware or conduct phishing attacks. No scripts were extracted, but the presence of numerous external URIs suggests the primary attack vector is directing users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5307

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://pixomot.ru/uplcv?utm_term=best+emulator+apk PDF link annotation
    • http://hflchw.com/upload/file/wowevibupeju.pdfIn PDF document text
    • http://axwelindia.com/uploads/kuwomusejigefipovak.pdfIn PDF document text
    • https://bharatbiodiesel.com/userfiles/file/fiwamipero.pdfIn PDF document text
    • https://giriconsultancy.com/content_files/files/zirevidalujakodusifax.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/xukokiridilejib.pdfIn PDF document text
    • http://bowlingkillers.com/imgdb/files/zogajabowezunegegimakol.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613da2d0e635a---44525422489.pdfIn PDF document text
    • http://win-sonic.com/ck_imgs/files/moguro.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210917_002016.pdfIn PDF document text
    • http://candleelectricals.com/uploaded_files/userfiles/files/tapaviri.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/xenozumiruwa.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/zokojubosutel.pdfIn PDF document text
    • https://www.anoregmt.org.br/ckeditor/ckfinder/userfiles/files/rupiw.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/42962235643.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/5595919623.pdfIn PDF document text
    • http://muszempilla.com/files/file/neleworamudimozefo.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/80611188679.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/23327302754.pdfIn PDF document text
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/nisodezovazojevijajomex.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161480b2b2fc4d---1787232543.pdfIn PDF document text
    • https://hk-delight.com/UploadFiles/file/lidawiruxen.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/mowupojibeli.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/15628547446.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090713424610.pdfIn PDF document text
    • https://proxus.nl/file/11997757694.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_off0000b32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB32F 10464 bytes
SHA-256: c96ba6a6fb6db110d90d96c8681421c1fdcd31a132abe0ea4c8a1b1e8f0d91c0
font_01_sfnt_off0000cb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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