Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa2c6f104dcb062…

MALICIOUS

PDF

72.9 KB Created: 2021-10-02 04:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8cf5b1fdf6f1d5d41e769243772a03eb SHA-1: ad3fe4ccf0e734c5ab832c15e1b2e8399367e291 SHA-256: 9fa2c6f104dcb062ccc2b42a6f81bf94faf7c6c835d8eeb8d9c86f2ac6c8f48b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, directing users to various websites, some of which are hosted on compromised CMS upload storage. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://easypayindia.in/userfiles/file/46668083119.pdf In PDF document text
    • https://frontivo.ro/userfiles/file/tafafevuniferefelonifo.pdfIn PDF document text
    • http://abwingssuffolk1.com/uploads/files/61191684160.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210918214321.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/masoxanemanaturejupawutup.pdfIn PDF document text
    • http://mylodge-naoshima.com/14188545900.pdfIn PDF document text
    • http://apple888.vn/luutru/files/57902081409.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614d1699959c3---xutifisuxarogapivitok.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/93118708570.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/dofaf.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/rusodatosomabixesisij.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/senunasigavazoj.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/nunapajujizelumen.pdfIn PDF document text
    • http://synphabase.ch/upload/file/31864542239.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210905160322.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/161448dd92c289---37789242057.pdfIn PDF document text
    • http://hagelkonzept.com/userfiles/file/25812149162.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e32a7bbc7d---tuludebefu.pdfIn PDF document text
    • http://dentistturkey.com/image/files/gemobenoxixumaxalugodase.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/70986768241.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/4b46ecfe60b851835a893dd8ae880f38/wetifikutijuzijatewev.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/rututunanoseliviwujipa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=rumor+has+it+full+moviePDF 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_off0000b568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB568 18620 bytes
SHA-256: 85b8ea138735e58faebd2dcf38c3ee69347e7d0e5fa7e22dbf3b50582ce5c894
font_01_sfnt_off0000e636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE636 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4D 10588 bytes
SHA-256: fd760960816431d8ceff74627326c52812c31c765244ae53db71f366ba44f9a3