Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bd3634e62ddd3a9…

MALICIOUS

PDF

84.7 KB Created: 2021-07-16 16:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d8c5383d9488ddf6ab6e96af8e48103e SHA-1: 349a36c592391ad73d1707b5600902201bc12883 SHA-256: 0bd3634e62ddd3a9ae8b98497cb09b8822173914d95d9c7ae2dbb49bc838f885
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to websites, several of which are hosted on compromised CMS upload directories. This suggests the document is likely used for phishing or to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://mini-garden.ru/userfiles/file/87836453057.pdf In PDF document text
    • http://studiobardinisrl.com/userfiles/files/16686745701.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/davebiwozofal.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a51d0ee66a7---36078156908.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/jigitobafufevoxanidax.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/a701ea5dba38da308b5d267d3bddfe06/773702842.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/n8ik5bfr348d0m2jdqnl2bopb2/lirivululumezijunufojixid.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/d4him48urqn2avgme1ci3gh9oi/dokofuzenigokojozuvezino.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/acka4ibppe49h92di9qrc4n740/35390480360.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/45470327491.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/vizudomuvunan.pdfIn PDF document text
    • http://richfield1960.com/clients/865265/File/81634509861.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b87a396d5b0---nudezetiwuzomifenetodonu.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/55657301950.pdfIn PDF document text
    • http://sam-global.info/files/file/33942323779.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/tejakonugo.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/75675521857.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607590091f283---67508937663.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a37e1cc97---tivitaj.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/74676177746.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/n5r3mlchh8f540k88loikqu3g7/litifoxuvuvabeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=emma+townshend+fly+awayPDF 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_off0000da52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA52 10612 bytes
SHA-256: 1df6fb4024437e49906e52f7dc9a563f4e3f84e28e31f29415e925dc2915d014
font_01_sfnt_off0000f27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27E 23460 bytes
SHA-256: 94ae222e56a4cce6a37d67797067b76550478b206d4622b53eccdbca072bafb1
font_02_sfnt_off00012c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.