Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6203ade1ad379c1…

MALICIOUS

PDF

99.8 KB Created: 2021-08-03 10:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b209374e9fbb9af64535c15b362555e9 SHA-1: afb393c18309b4f061cfb5e957947e5154fd49bc SHA-256: d6203ade1ad379c1902e1be2b058841482fe0479e62b6f0bc3bb0b7e70cc8b0d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://wastran.ru/uplcv?utm_term=formato+para+cronograma+de+actividades+excel PDF link annotation
    • http://uticachemical.com/files/upload/files/89355589356.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d39a60973e---96356236298.pdfIn PDF document text
    • https://digireg.ru/upload/59558143664.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083523e52f90---42665845914.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/1bc80a9ea4729e4df0ec0ef359bb481e/geminup.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/18566955483.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/tamopopejoritabi.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/57734983275.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/88241180913.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/i7hfgpbf06di5shbakb1frnstu/56359510189.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/64954429249.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/fizatiboleruzo.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/pisomaluxem.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cae1ec788---xiwazubosel.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/gamorumepojadotike.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/nizekekozinilewunid.pdfIn PDF document text
    • http://chongros.com/userData/board/file/mapoxo.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf28a5dd770---dozixeburapogu.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/worowofazexazuzaporamufi.pdfIn PDF document text
    • http://ligneus.hu/upload/file/1541123907.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/7bc6f0924e9fa065d748f11def143698/68227787447.pdfIn PDF document text
    • https://sanagustin.cl/files/gubopitetidemed.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/46482287635.pdfIn PDF document text
    • http://klinok-saintp.ru/files/xadiweka.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_off00011e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001364a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364A 18112 bytes
SHA-256: c4ac0ad56f915599da860b6eb83768423d0821f1020654f26cb52e90ed461f39
font_02_sfnt_off000164b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164B3 11000 bytes
SHA-256: ea8f44009338152a3f870f82d8ccee0a908067cc456e28c8c027f6696429c071

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