Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7ee5a97e139ad3…

MALICIOUS

PDF

83.6 KB Created: 2021-08-18 02:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a8a487c8c6d9124081c0f1301a3e26b2 SHA-1: a16725f4b7913113c4f243f38f3ecde4d9a128ef SHA-256: 9d7ee5a97e139ad39594153232343bc6ecd61a619b01ae0b231a1977548c6b15
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to compromised CMS upload storage, suggesting it's designed to redirect users to malicious sites. The presence of a 'download' button lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.amedna.com/userfiles/files/gububogaluruzedote.pdf In PDF document text
    • http://csc0532.com/userfiles/file/20210618050510_edfalu.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/97930440720.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/bd05e086b6400f44734cfcef59de644a/wevutavuramezumopamoxasa.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210524091909.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/49abae4d581e454c5aad2c34bef1603f/misoxerije.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/butazipufitamit.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7f9fbce62---89360023774.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/q09dp9bis0mcik46mdl1rrerp4/63783510800.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/d3673d8402f856970bd6a96537b7d63d/vosifovatepomitopi.pdfIn PDF document text
    • https://ccskin.com/geektic/files/sasofisiveponilixuk.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/dabidokizenebabakegeze.pdfIn PDF document text
    • https://codecs.ro/images/file/12580818022.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967be482a67---toxudededoxelapitanutuxu.pdfIn PDF document text
    • http://ministerium.pt/files/lumovatopixogipekituve.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/ramusetirimevir.pdfIn PDF document text
    • http://gospelinamerica.com/clients/874377/File/12920862805.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608654e77ac8b---tikuvugusuwi.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/8b16b3f3b68472442e0dc64165d8bdc6/vogitofaru.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac8443bd96---pokaxexalivavofojenenuv.pdfIn PDF document text
    • http://sam-global.ch/files/file/77561040812.pdfIn PDF document text
    • http://geobigoni.it/userfiles/files/rirararusivotepido.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1bb7a5ce6---zitogowaza.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/nozen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=singh+is+kinng+full+hd+movie+downloadPDF 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_off0000e40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC24 11020 bytes
SHA-256: 9b9ea8bb6a9508376babb20632f9c95579cf1807b6870f877a9da9f6fdab215c
font_02_sfnt_off00011562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11562 16752 bytes
SHA-256: a968581c1ff3f976752de25051509ec9786e119bfabd5fe01f40fc8933ab3469