Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d31116169edd55…

MALICIOUS

PDF

90.4 KB Created: 2021-08-01 05:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 444076b54380ad7ec02ff65d6bd258ff SHA-1: 5ca8819e4ed6c1494d4e2c5b01dd2bba0e32ba86 SHA-256: 08d31116169edd5522e993beb02d302ade31fae8d2ef238dd83e5b573c9ed9e5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate maliciousness. The primary function appears to be redirecting users to potentially malicious or phishing content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/uk7bjfnfhdkloepkpgct5c2a51/31495156980.pdf In PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9413ec8d---likikurasumovosu.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa328817d6---xidobawuvanabudubomo.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/16458118871.pdfIn PDF document text
    • http://phsclassof1970.com/clients/875774/File/77309122499.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/526cd3400e33d7fe4c9c0f9c4ed161f4/71710079462.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/17076441947.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/qft38n8a07deg3g5cisu6m7s59/petajuti.pdfIn PDF document text
    • https://dodomacnosti.net/data/file/30236272964.pdfIn PDF document text
    • https://la-klamm.org/Files/files/bevokagixixosimugu.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/66303165406.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8619bbc033---64895392999.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a10766f64---91495232441.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/kojusam.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/1664138c4a8e8657c854277f72afcfc9/92792457744.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/fexaj.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/c9cc125e1d47f439f85aee8ad6bca410/bovujodimu.pdfIn PDF document text
    • http://sclifeguards.com/clients/16854/File/78348231632.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/70075562445.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e846008f0b6e0f052b55ddd6550f720b/fipaw.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/0f6d4174a57cb42d36b24e6c23c39399/78525252965.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/259737f0f2cb8a93c0f02716f877aaa9/gefokarali.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=classroom+observation+report+sample+pdf+eflPDF 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_off0000fbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC5 17168 bytes
SHA-256: fa0ec4a0a3775150023fe7f7b46a0221d9b0130f55f0da30e77878a941a94595
font_01_sfnt_off00012785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9C 10896 bytes
SHA-256: bb9c38af278c703ffd96c6ace611f363c8b92096679f712982f75e75058e731f

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