Malicious PDF — malware analysis report

Static analysis result for SHA-256 0353c89b0739c002…

MALICIOUS

PDF

73.8 KB Created: 2021-09-19 15:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c1a915885576f3435bbd0e7714bc002c SHA-1: cee0e772ad260eb815db5f0c4677a526154c70da SHA-256: 0353c89b0739c0021ae25131a25175a35c427334b4705c031176471981f9c147
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a significant number of external URIs. Heuristics indicate it functions as a link farm, with many links pointing to compromised CMS uploads and disposable hosting. The embedded JavaScript likely facilitates the redirection or further malicious actions. ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a phishing and trojan delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=transfer+pdf+to+excel+online+free PDF link annotation
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142012c2b59f---42547294920.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/pojanomijolosulupa.pdfIn PDF document text
    • https://digireg.cn/upload/51604356015.pdfIn PDF document text
    • http://jump360.co/upload/files/20210905041025.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16140e3d8153c7---dodezikudagipezidavilog.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/totamevaz.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/vororajipijomalusozawisan.pdfIn PDF document text
    • https://nmcs.ca/userfiles/files/18006729150.pdfIn PDF document text
    • http://jar-ted.pl/file/57297506882.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/jawifidavaxo.pdfIn PDF document text
    • http://jezirka-biobazeny.cz/UserFiles/File/53854358949.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/67996412124.pdfIn PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/nagunimutupivamit.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/xanabofik.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/xajurolebep.pdfIn PDF document text
    • http://sayarbobinaj.com/file/68424061491.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/22561408512.pdfIn PDF document text
    • https://maria-galland.ru/files/file/kapupajivolomixoxewume.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/89293754036.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613425dae7878---nuledozusipasadibadum.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lajalumakenu.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/70766029452.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/16316152669.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/roded.pdfIn PDF document text
    • https://tl-systems.hu/files/files/97799855949.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/66530367646.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_off0000bfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE1 15888 bytes
SHA-256: 93de6d190ab12c4e259640b34a077c8c01afc3c074de74cd16f0fe534900d8e2
font_01_sfnt_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001005f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 10676 bytes
SHA-256: 714ed18c23a07b16d321d58ee3ba4795f325b5df9569135894ba610dfc6780fd

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