Malicious PDF — malware analysis report

Static analysis result for SHA-256 486e6fea584c59a4…

MALICIOUS

PDF

112.3 KB Created: 2021-09-07 14:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4aa5648f5e079ca8b1c3efa8507dc020 SHA-1: a5957510d3fc0d78f5d322e2369cf031905ed604 SHA-256: 486e6fea584c59a4e739a07d6f77431143b9be98321c68cba9d50eb61e3f7f7a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many pointing to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the extensive link farm suggests a coordinated effort to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://irlanc.ru/uplcv?utm_term=warfare+prayer+points+with+scriptures+pdf PDF link annotation
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b3ba422b8---wekad.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/benufov.pdfIn PDF document text
    • http://epodhajska.eu/UserFiles/File/85391517952.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/28791739624.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b9d81a25c---22613690614.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/7261905775.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104a32465140---wegebasibeladavonawaw.pdfIn PDF document text
    • https://isosklo.cz./uploads/80219094584.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/2661a060cf1776317aabafff365875d4/munalezomafa.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/dipavujuna.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/86625991154.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aba54b66bbe---mujurigus.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/943ef7c4af8ebcbc7f989c7dbc3fba75/59296911013.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/2956b4f8f296517f4cfc142282dd5e91/38761951321.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc1fc7431---9690111950.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/nigidomivewipebasi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/k1erhj6tpk576cconlel06i86q/73689864415.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a9bbed1ae---suvopepotegogudesuvez.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/c6a594e11544bc7c7a8cfbde46308900/nudujatupirer.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097fd7c34d06---bokawewitaka.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/67809177901.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/80585939861.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/pawoziwubozisitovuribop.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be654aedfe---30305298331.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/41390204840.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_off00014ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000166b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166B9 10964 bytes
SHA-256: 1c54c5c4c3ff18a9c241e61e84b3748a3b71375e3db334fe21dc8a8c6c7b9b18
font_02_sfnt_off00018030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18030 19604 bytes
SHA-256: 4753b58ff9c29910fb6cacae77b50cf1d8dda8ceebcf9545151df31e55cfd122