Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b7b202a64e6713…

MALICIOUS

PDF

82.0 KB Created: 2021-09-05 08:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8b636b420432c458d63c6206f4372d7f SHA-1: 6c11ef5cb0d8860fd18649a714a1ff6295e40c61 SHA-256: 59b7b202a64e67133dd2357cac9eb13b6a5b42ffca1441302d8a0e658f13dc64
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The document body is heavily obfuscated, preventing a clear understanding of its specific intent, but the presence of multiple external links and the overall heuristic firings indicate a malicious distribution attempt, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • 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.
  • 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://cowichanseniors.ca/userfiles/file/kogatodolonixe.pdf In PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/2djd8q1vjj8ltj73avs3ptlnl2/62006253690.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/xowosaxufiwutabobum.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/rorekesofisirukajirufu.pdfIn PDF document text
    • https://starbox.fr/img/files/rogepi.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a96839491---raregurupabik.pdfIn PDF document text
    • http://robedecreateur.com/img/files/wedimupezom.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/lasabeduv.pdfIn PDF document text
    • http://cherryontop.pl/upload/fotki/file/34570882583.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/1b3c927b2a218f413b8ef43a2a9086ad/67539704629.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946094eb405---85034798880.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/41986812062.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/57878253319.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/7f3gbqbol1uhj0gpf5mmkp7fs7/folugisogalorovirubugevi.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/lesexonewaletotobi.pdfIn PDF document text
    • http://rubensova16.cz/files/file/78565462057.pdfIn PDF document text
    • http://charivne.info/images/file/17645727538.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/epric6jlphfc8fpjeotk33cup2/jikozapunipeluvumojis.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/10hhcv8701i407ocpurk12phup/17739292541.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/9dd0ec787f7d5d7ba11cc1d72e601703/winasijoresilofip.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/ea1a02fae34ae07f0ae2422c8ef9b87d/bimutufajobudusutiso.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/84523088354.pdfIn PDF document text
    • http://balashixa.inhome360.ru/admin/ckfinder/userfiles/files/seropomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=morganville+vampires+book+1+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_off0000d873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD873 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF085 18548 bytes
SHA-256: f2fe841c82db7041793647d470f8336ab9258eca9068078280859d363b3a8a5d
font_02_sfnt_off000120c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C8 11088 bytes
SHA-256: 329f0c7f0c51aa49cb6c8c3748c11c6b3792681cfad5d63a0085eaefe8a642b7