Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ea2df0d9bf6651…

MALICIOUS

PDF

102.0 KB Created: 2021-07-30 21:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 162bac7f8dda75ddfc21618862afc1da SHA-1: e69b3a1c7a55111d0e96c39553a9dc27b7a8c055 SHA-256: 84ea2df0d9bf6651471a9d1dbb8f6b699cf8521bd94258b811869fe5f220db6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm pointing to multiple unknown domains, suggesting an attempt to redirect users to potentially malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865478aec22---madelidipilopupej.pdf In PDF document text
    • http://www.yemany.com/yemfiles/files/13197474129.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083540a69454---74514545329.pdfIn PDF document text
    • http://osheamaloneynylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3347314535.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/13237342315.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/rv7vg8l1fq4f59tjvnt0skp54p/bejomapim.pdfIn PDF document text
    • https://ewdel.cz/ckfinder/userfiles/files/netozolujuzemagixiwaked.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/bbd92dc6a083edcf478b6caf2333fe35/gijifodak.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/21166849203.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/4a482ee818c4fe1b63c6e8eec478bf37/52980323822.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b33d297e811---diraw.pdfIn PDF document text
    • http://alltechsro.cz/files/55466253875.pdfIn PDF document text
    • http://bjjiffy.com/upload/toduba.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac68dc36fd9---biwokofetuw.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/5s5qiqqt1ijcvq89oulksk50cr/zubitipebizenadus.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fb11953b4---lepored.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/4b6f1169cdb1714d9aee3f13f7e9c0f2/42830814708.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-6/file/dowusebibakoje.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b68db245b8c---jedolasawaxajije.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/2c80d6e8a877764cb72cad3574c61084/84899912945.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/pisinazijugigelemariti.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/99586318429.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/dkh58apkdvcuavv44e9pmagnl7/83141597680.pdfIn PDF document text
    • http://petersonhigh.com/clients/33446/File/zutaxes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ejercicios+de+regresi%C3%B3n+lineal+simple+resueltos+paso+a+paso+pdfPDF link annotation
    • 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_off000120e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000138f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F8 11312 bytes
SHA-256: 8379dc8252a0b3e508490fc5fb133df45766c0fc4c869a1aeb390893e615a52d
font_02_sfnt_off00015309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15309 19792 bytes
SHA-256: 94c6c16de042cf339bd41080a96ecf04d2df5f0cc8ca795d46f61346ab123420