Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0c235d5e8200dc…

MALICIOUS

PDF

79.9 KB Created: 2021-09-03 03:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 71ba04bcc49733dc07ffacf234609cc9 SHA-1: f4e6a36dec4f148c37fd981b0eecea7ab0865029 SHA-256: 2f0c235d5e8200dc2ec64949d8fa9eca26825ed949cb9b6dd04b64878da2a415
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Phishing.Trojan'. The presence of embedded JavaScript and a large number of external links, many pointing to compromised WordPress sites, strongly suggests a phishing or malicious redirection attempt. The primary purpose appears to be to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607411539367a---13776659506.pdf In PDF document text
    • http://hanasushimenifee.com/uploads/files/24490498189.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e5b36807a---dojulalijidanakevidin.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50b40df45b---23601149323.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093964dda11e---gitemowis.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/44224173570.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/8c8e1d18928628f657271f20efa09368/62735485688.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/4920278232.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/20584495149.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/c60b2d9c43c697c9ed7078b5eb2d69ce/57040016722.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/62663837867.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/jajasivu.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/tefifamanawum.pdfIn PDF document text
    • https://dichvuketoanvn.org/uploads/files/9374934146.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/bivugolezirepubutilewe.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9fc7a4d81---18697853911.pdfIn PDF document text
    • https://fallsplat.se/file/fowakafoxuw.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/dijigiwefoz.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/guxidaduxuza.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/5610464809.pdfIn PDF document text
    • http://deccanquest.com/konadnew/userfiles/file/firajugopomotuvofogo.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/rutokulewebutapafuxe.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cfc534b176d---xigosukejomafuvabekofefux.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/58366066417.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=plantas+medicinales+de+la+sierra+ecuatoriana+pdfPDF 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_off0000cff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF3 18832 bytes
SHA-256: cace8b19437c9b33a9131cdaa4faf641b199f699b441a02d3841b0f5e2247e36
font_01_sfnt_off0001003d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003D 10884 bytes
SHA-256: b3772bb654ce17b9f9a52b8951c4ddb764d94f0e4e7185cbc71540b7773d8e15
font_02_sfnt_off0001195c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1195C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1