Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ff2a6f08c3d6b7…

MALICIOUS

PDF

96.3 KB Created: 2021-07-22 23:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e9f71c23ef05ae6980ec25a4d7742b19 SHA-1: 90efe662ccd6c610614781d1779f625a25869ff4 SHA-256: d2ff2a6f08c3d6b7eab0516ea3609e28b5de00820ff4431a13e6bcd382475281
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, pointing to multiple compromised WordPress upload directories and disposable hosting sites. The embedded URLs likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/15f540a81e5a36d6c87af1a57bf4b69e/46285396833.pdf In PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2f114d80c---24758327498.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///38902736756.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b498ddac563---zegetikek.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b7cacc0d9---loriloxudazemeboku.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/fb5bfaefbef6e9bdd06a01e3323c0d01/9670018825.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/bbaed8290774a735eb5ead85c9cd0e4f/xiked.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fe946b8ac---69286945195.pdfIn PDF document text
    • http://uptownherndon.com/uploads/files/rusifonolowobisagipi.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/6sqlr8nn6c68k73pmitedkvtb7/29767375596.pdfIn PDF document text
    • http://thehigh86.com/clients/13680/File/gapimegisexofasikozezir.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/61469374061.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/735fb75dd9fb6bfdeccfe47b43be9e28/75933502179.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a94f1459cf4---46835406375.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/b847163565e3f0550dfc9ae72893258b/fuxeworukinan.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/32333826078.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/25482864092.pdfIn PDF document text
    • http://bendhorseride.com/userfiles/file/gagetejewoturowazazegiki.pdfIn PDF document text
    • http://packamate.com/userfiles/44507464848.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/68243641507.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/kosutugijewuxi.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/399cc1bbecd359bb89b8cba54cffac32/14967541241.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/75160437520.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/33676961026.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/93625195204.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/39000306107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=violent+reaction+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78D 17516 bytes
SHA-256: 213b3df76f7f60a73d130a96ab7ccfc9b531922174d8b253d7b5cbc2d5db61da
font_01_sfnt_off00010222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 10376 bytes
SHA-256: 1bf9e3e43a1f9011b051a3799c8e4d9bb12f2bb81e6a5b7aca7e767b738d2b24
font_02_sfnt_off0001198c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198C 2144 bytes
SHA-256: ba11dd31f404bf627f658624cadb4ac9bc276c015845247184a958ff097dfc4c
font_03_sfnt_off00012342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12342 21020 bytes
SHA-256: 15b8d260a97fe9eed657e20233370b988514cf8abdbc239d97d41139d5095136
font_04_sfnt_off00015870.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15870 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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