Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e81121f58e48ce…

MALICIOUS

PDF

84.5 KB Created: 2021-09-01 09:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2caf7308d59cff6e274779bb9e60a7ee SHA-1: 6346c08aa7a80d9186324158000adccf71b01fb7 SHA-256: d0e81121f58e48ce8d8c805d8ea5756bd4d6936d043f9a8646a0c67b310ecc3f
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. The presence of numerous external URIs, many pointing to compromised CMS upload directories, strongly suggests a phishing or scam campaign. The ML classifier and ClamAV detection further corroborate the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pixomot.ru/uplcv?utm_term=shelly+cashman+access+2019+answers PDF link annotation
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b0f08ac8f---7251018983.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fd620a5df9c---bekugozamuzuvu.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/lisenogomezofobozelapuli.pdfIn PDF document text
    • https://hoongnau.com/upload/files/18533985849.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/d37dd5fe0dac5ebaf384dc8c3de5ebe9/budemusolunevujuwewa.pdfIn PDF document text
    • http://simonide.org/userfiles/file/biwanofuburigu.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b97821898de---zasujakidetejesupo.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b62bcfb4241---gowogoxi.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/1bd6aj2302ue5k26g8crehd7f5/pikarefijoxolavujelexo.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/dutadaravevodawifa.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/mowilebizaga.pdfIn PDF document text
    • https://birudongker.com/contents//files/vawevus.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/gubezalurobikokawusefa.pdfIn PDF document text
    • http://patriabrno.cz/userfiles/files/vufimuxanilet.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/mijemejazufilesu.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/wisujusu.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160872dfa85bf2---jakesewugodapova.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/32e2c047c5636f1a3c91d3aca23a414f/46344164552.pdfIn PDF document text
    • https://aspirans.com/files/file/59324196474.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/jogifalafisewos.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/ct6ofmni2ait9kn2uk74kg08d5/35215141282.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/72575592101.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/xuwomujekodozafid.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/34095976619.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_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 10924 bytes
SHA-256: e0034a6493815187ee0231af6735242e92d9aec4757e4e7be1ffc29ccd37e43c
font_01_sfnt_off0000ff8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8B 17056 bytes
SHA-256: 7ce0aecff3e83f1df124058939af8229ead6b9702a3fb101ef454af0071fbdb1
font_02_sfnt_off00012c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1