Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdfe8c74d45438d2…

MALICIOUS

PDF

88.2 KB Created: 2021-09-23 23:26:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e09435fd6e5c8648ad27b7ff4acce998 SHA-1: 9f755504d1104feedbce62f3139c8afcbb6d1b2f SHA-256: fdfe8c74d45438d2dfb6870c928dcbf69e2f4216c939a63be26d92e3fdedac0d
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The heuristics also indicate lures for password protection and MFA harvesting, consistent with phishing tactics. While no scripts were explicitly extracted, the nature of the embedded links and the overall detection suggest an attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://repetitorebi.ge/userfiles/files/97673620552.pdf In PDF document text
    • http://toyteepee.com/uploadfiles/file/2109190917373712866hlnum.pdfIn PDF document text
    • http://kimsanghun.com/upload/userfiles/file/2021911204467450.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109051221046959.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/161354a851e25f---26875811142.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/lerexigapi.pdfIn PDF document text
    • https://mimpishio1bet.com/contents/files/9985457617.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/11007594943.pdfIn PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/dewitelofaxaninazojenaf.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/gitixawemoxezurivimirafuv.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/lujiwaxuwizogerov.pdfIn PDF document text
    • http://trubaopt.ru/content/file/79044037279.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/57553115239.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-2/20210902200113822875.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/e3m9c0k311dfi3urphnoc3rbr2/51410725625.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eef64acf51---zelofidilibalaja.pdfIn PDF document text
    • https://kangaroovietuc.vn/webroot/img/files/genum.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/381b97df72499a03f39bb182d7fe637f/72707680069.pdfIn PDF document text
    • http://osingenieria.com/images/admin/file/856737334.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/83037298516.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/664239546.pdfIn PDF document text
    • https://promaxsuspension.com/csmimage/file/madaledetozijagu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+bypass+a+phone+passwordPDF 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_off0000f4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFE 17916 bytes
SHA-256: 68d5c8db1a889609d2bc9e37d516676dbde403c52d48a4eade6cb41fc4a401d8
font_02_sfnt_off00013ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE1 10684 bytes
SHA-256: c753513f6f6b272bca47008491e078bed2a63b1cd3eb1154ab3be3208db2bf31

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