Malicious PDF — malware analysis report

Static analysis result for SHA-256 650e2d9b2dfb63a0…

MALICIOUS

PDF

91.9 KB Created: 2021-07-30 06:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1d978f73d7c15ba1f95fd019eb629558 SHA-1: 26c0d0b263a415460ab612c5f8bf9875e7aa0ec8 SHA-256: 650e2d9b2dfb63a0e85a581d9664290a351fc6da025fe66cf7755710811883f9
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 phishing or trojan distribution attempt. It functions as a link farm, containing numerous external URIs that point to various websites, including those hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://inwebjor.ru/uplcv?utm_term=eternal+sunshine+of+the+spotless+mind+best+scene PDF link annotation
    • https://dbmotorbrokers.com/userfiles/file/89248957947.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a6d40c347---83203591302.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/e8e5a47154d75d197c06e810d39831a6/nemoludapulezo.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e4ca33171---gofevesozewafi.pdfIn PDF document text
    • http://xn----dtbhwhggdaoqfh3d.xn--p1ai/media/file/21952175563.pdfIn PDF document text
    • https://digireg.li/upload/wirivewiseg.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/632f6da6d732140a33a413de7abc3793/mupovason.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/71185292235.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/3138e1489208ac234e92e5dc4eadb140/pomibutabeb.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa3206d172---tewutekugesozilumagapa.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079a4af75ce7---gefun.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/octeug1mgp0rhu8gmbgpku2vg5/xigodez.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/24238770544.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ccb570ddd7---nemefumapewixanoka.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/45627151902.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/73124804694.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/xagikikowa.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/e1e12ea906dea234f496d6f4d95d1fb2/toremijulagek.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/aaa313a5565da75895eeb6b85fdedbc3/gofetuna.pdfIn PDF document text
    • https://argumentua.com/i/file/nemanisajusisosukurixi.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/38899723072.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/garikib.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_off000102cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADD 16900 bytes
SHA-256: 1d13d436f5d5b8e52bc20508fdb8e7ffeb717d6d499b77418f61886c1cf8c145
font_02_sfnt_off000146aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146AA 11108 bytes
SHA-256: c08cc970c6e2926aa6d8a3d4e7c79f00f5a288dde9a52ed66e6b37d313a27a55

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