Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c76d690668e2ee…

MALICIOUS

PDF

77.0 KB Created: 2021-06-30 21:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2b81a220b3b5fa93965a7bdd65a6e327 SHA-1: d26495df96fe0a94d37e1204a7733a7fa7ba939f SHA-256: d6c76d690668e2eefb9f35b7b607af7cf5755c3db25ebcc4926f8bc5b1443078
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and by an ML classifier with high confidence. It contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The presence of link farms on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608506b4c491a---tirir.pdf
    • http://musicpark-live.de/userfiles/file/18208509883.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/8054368c63354bfa8a1d7de6015e6643/31147079805.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/a9a8488380d167b87d651a0c4a72b881/54975936980.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/0dd17d6d5ce232c50042d6da823d6b7f/jerililapezoguwodugotaji.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/98223d03778860d12264c4048288e3d8/fubotobokinoku.pdf
    • http://dulichgiahy.com/upload/file/91126730192.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782c646af0b---muziximegedegunabew.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/tmj17ejg7opmueb2kaj4mlvpi7/xiwutaxezis.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/35b3a7fe053d0f62381269be2695f1ad/natimodano.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4f02b8776---90955823652.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16079044d85f1d---85095654523.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8886f3fe4e---polugebesanozekalegotegaw.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609602f05a498---10079466071.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/ca4489df5367b9ee6877b72e6ec5ba76/23727692287.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/5260n5t8jg1kao1kughgd8hse5/63410137234.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875b9fbd862---matumasudaru.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160734b4baf9e6---lixojufavutowofuvewedexa.pdf
    • http://challendor.com/fckeditor/upload/file/medijavub.pdf
    • http://thepokeluau.com/uploads/files/raxewuvozimepu.pdf
    • http://sola-brothers.com/userfiles/file/vedusarovejebejejexoganaf.pdf
    • http://citysuji.com/ckfinder/userfiles/files/tomedidoposemedup.pdf
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/dd44a14cc331258e7c484c8235f5ebfa/bapomejalisubabatatig.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/c36b86691c24b265432c4bba5d0b110a/tevebilabitakesofed.pdf
    • http://bhhangkhong.com/upload/images/files/91338025839.pdf
    • http://benjamin1908.com/clients/f/f4/f4560e3fe432b95d15e234f900dec36a/File/28249744119.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+many+pints+in+50+gallons
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb36.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB36 16792 bytes
font_01_sfnt_off0000e348.bin
244e61a3d4e334ddb2f31b848b5afcfc511d4b3ccb14a375b1e2e3bdb67e326b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE348 16356 bytes
font_02_sfnt_off00010d9e.bin
480d309c48406e7c3e5be675043ba8f19d31f60fae198f721f21257fc511a454
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9E 10808 bytes