Malicious PDF — malware analysis report

Static analysis result for SHA-256 9658a4d5df90d0ef…

MALICIOUS

PDF

127.3 KB Created: 2021-09-15 09:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d5ff2c352051a75d2dff25dd3cebfbae SHA-1: 6d54aa5de619a422b7448ad5791a778bdd6223b2 SHA-256: 9658a4d5df90d0ef964635808fec23e5da620454219291f276e64774937af4a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://crysiq.ru/uplcv?utm_term=persona+3+fes+social+links+guide
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16141386d43c75---39036093300.pdf
    • https://inprovit.com/ckfinder/userfiles/files/16706470755.pdf
    • https://tigapilar.com/upload/files/34940996199.pdf
    • https://hattshopping.com/admin/assets/images/ckfiles/70075876727.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16132ea4d627ba---26793442641.pdf
    • http://kjphotocon.org/data/userfiles/files/36753698838.pdf
    • http://webspace.mysdam.net/images/newsletter/files/setim.pdf
    • http://jingmingtai.com/filespath/files/20210904100549.pdf
    • https://blueparadise.pl/userfiles/file/26456002007.pdf
    • https://endobible.com/userfiles/file/17497122775.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/9a6853b9b75b7a52b6e3c22c8e159708/40204527728.pdf
    • http://konferencii.org/web/uploads/assets/file/zagunepevomanelurukisim.pdf
    • http://bandbaajabarat.com/ci/userfiles/files/72004755674.pdf
    • https://ego-sofa.tw/uploads/files/202109110158251751.pdf
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/lawodopuzanidagagunuja.pdf
    • http://ahzgbh.news-read.com/upload/files/megexanapizunisos.pdf
    • http://tutaylamhet.com/storage/ckfinder/files/46457037175.pdf
    • http://santabruna.cl/upload/file/sugitadosugoxobozuloj.pdf
    • http://sushrutproctology.org/ckfinder/userfiles/files/petekufimefirikalufef.pdf
    • http://demenagements-remond.fr/userfiles/file/20210909110347.pdf
    • http://kamerton.nl/clientfiles/saxapamaxomafovubew.pdf
    • https://franchisefarm.franchiseharbor.com/files/files/dajagofowufapibuxe.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/39889834049.pdf
    • 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_off00018466.bin
6433dd0f2c21f1eec575531bf42224ec8457d7ee2c032bb80a19f39ac2fc0e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18466 10920 bytes
font_01_sfnt_off00019d9a.bin
072436844d3269fddd6f6f736076198839f175eb7032d76ee073f25754a559de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19D9A 21656 bytes
font_02_sfnt_off0001d692.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D692 16792 bytes

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