Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3e497c6d56f42e…

MALICIOUS

PDF

90.9 KB Created: 2021-09-04 15:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3b00d867dcb2785a0ddc62d4fe573e77 SHA-1: 288ae11d83523c4e8cb4de4e50e495e829532826 SHA-256: 3d3e497c6d56f42e534775e362f079ca3463b304c0f3552915fb74f841bcdd2d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it uses a browser extension or update installation lure, a common social-engineering tactic. The ML classifier also strongly suggests maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it aims to trick users into downloading and executing further malicious content, likely by exploiting a PDF vulnerability or using JavaScript to initiate the download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b316ce9eb28---52176752332.pdf In PDF document text
    • http://world-green-hope.com/uploads/files/sapurujelan.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/rexisefetagugexoluve.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/dopagufonuzajon.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/regubuxavazinul.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/928j5vr1r021h9fbiloo9glsij/9769784695.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/78671816772.pdfIn PDF document text
    • http://erimti.com/userfiles/file/bugusugemekumalijew.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/80434003123.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4971da31b---60240291273.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f7b5f027f---33607293380.pdfIn PDF document text
    • http://ilovestory.com/upload/file/ledemadopek.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/77456986120.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/xogobeg.pdfIn PDF document text
    • http://tinavaron.com/ckfinder/userfiles/files/jikubonegemurexonure.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ecodmv87udnn2th1jvq0pa5h84/fixukabuxujupodafoz.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/sebugabatexas.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/vepubadaduz.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16075fba84b17d---kadakifujepuxuxozum.pdfIn PDF document text
    • http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/51920961154.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160891a50e56d4---weven.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=english+to+urdu+sentence+translation+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/fd77bd657308b37424c14b527c19c49d/batapele.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_off0000f904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 10980 bytes
SHA-256: 803b982ab3bceef5328a9e771b001bd693a11828e24716e17474aae097db27b9
font_01_sfnt_off00011233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11233 19924 bytes
SHA-256: ba029619b51de810abc503519b3f0e853c3a8af96cdf036e90f34ec4f4bae55d
font_02_sfnt_off000145cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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