Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4df77220052378…

MALICIOUS

PDF

85.5 KB Created: 2021-08-17 03:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d5256be40ffd76fbb23de59162b7ee4f SHA-1: c44d486d3bf708ab3380596028d3d0d74c666afb SHA-256: be4df77220052378f1cc9c12c0e4907f35f2b1ec49fb34002527e5ee53e91028
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised or disposable domains. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://graficaeformazione.it/userfiles/file/sugugigebesavawimis.pdf In PDF document text
    • https://promise-land.com/upload/file/2933064712.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/96550133921.pdfIn PDF document text
    • https://butchercurnow.com/img/shop//contents/kodegaf.pdfIn PDF document text
    • http://thelonerangerfanclub.com/ckfinder/userfiles/files/walinidemir.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/gikogubomuwe.pdfIn PDF document text
    • http://kocavietnam.com/upload/files/gokamova.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/zujotixasex.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083e225c7efd---62499145138.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/2c2bqoapgfp6fvfliqb5knsnqr/39280150000.pdfIn PDF document text
    • https://armenia4d.com/contents/files/jadukovepujopawijapus.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/75733941326.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/wevabodibadeponiw.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/91957590110.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ecb94b77d---40163665034.pdfIn PDF document text
    • https://ketdoanbus.com/webroot/img/files/gaxogebakifoxipivimib.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/1a973f015906b17c41847bf903bbcd06/63321992385.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/40088431559.pdfIn PDF document text
    • http://parkety-patemal.sk/files/file/2849063957.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad0954c0ea---81930765306.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/68ba9bf8ed862cf78a8dc1f79a16da32/jorumivukibiwegodozokokew.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c8d63c113---59724455622.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a4026faed---nirijeje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=fortnite+season+9+download+mobilePDF 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_off0000e8cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E4 10780 bytes
SHA-256: e74c912452dbf92d0ba6de7bec53a2ee1eb83e2d3abef17742252730ff7af91c
font_02_sfnt_off000119be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BE 17508 bytes
SHA-256: 89588efb3cc1c097de1f367cf56475cbb01ec7427e53e379a7c054019c4e5e99

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