Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1412a61f84ed7b7…

MALICIOUS

PDF

70.2 KB Created: 2021-09-28 05:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: ec221070a0f6ae40d2ebe27790a94e70 SHA-1: 4b88273f0cb9a66015bf570dee34dcea7ad2e554 SHA-256: d1412a61f84ed7b79a6036d6b34059e5c4af29791d5b19f91d3ae6e24ee3fc83
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of 'utm_term' parameters in some URLs indicates tracking or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://laborke.ru/uplcv?utm_term=all+country+tv+channel+live+apk PDF link annotation
    • http://almawred-sy.com/files/adminfiles/files/16250758607.pdfIn PDF document text
    • https://telliogluhukuk.com/userfiles/file/dulopumufogedomaro.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/30230604285.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/vefajewilikaxoxikomuzam.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/94966291693.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/8390579064.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/0c99fe2a48aeadf1eb06528b8984e6d1/58446892633.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/99976736792.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/30925920297.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/9371137874.pdfIn PDF document text
    • http://autovoda.ru/upload/files/98172373733.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/faberatizukoratimite.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/36376571876.pdfIn PDF document text
    • http://sipsak.nl/userfiles/file/6691557792.pdfIn PDF document text
    • http://cnfgl.netsociality.com/upload/files/davewid.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/59021067536.pdfIn PDF document text
    • http://londonjip.com/userData/board/file/47419182551.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/62050830345.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614499383515d---37179803234.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/xisonakun.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/56039301865.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/89538468476.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000af94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7A6 16148 bytes
SHA-256: 319f2cefd8322198dda1b2420ab720d7ad78165174e1f5d5f2258d625d98aaa9
font_02_sfnt_off0000f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 10656 bytes
SHA-256: 15c581c76a44ae6ace82651cc41d8936af6c74b14ca15e90e3431cfdd671a644

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