Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90e5d474e2a627c…

MALICIOUS

PDF

92.9 KB Created: 2021-09-08 18:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 47ce7710f902599ac2cf47f615508fc6 SHA-1: fc2ed4e6f7b12ca7b4d8f14edc868bd785566dd9 SHA-256: e90e5d474e2a627cf64c222b25f44e05ced917472d1d6627ef5f091e0066f8e6
216 Risk Score

Malware Insights

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

The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent to trick users into revealing sensitive information like private keys or recovery phrases. The presence of numerous URLs, many pointing to potentially compromised or disposable hosting, further supports a phishing or credential harvesting scheme. ClamAV also detected this as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://kfk-dekoration.dk/images/uploadedimages/file/zixajovaresolozarosurep.pdf In PDF document text
    • http://www.vako.vn/app/webroot/uploads/files/26460227528.pdfIn PDF document text
    • https://endobible.com/userfiles/file/17119603648.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021090122033560260.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/vazivug.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/sumosuxor.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16137abe5eff69---fabetunuwibezavoje.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/lulomevir.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/17231669741.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d695295cd---68627371053.pdfIn PDF document text
    • http://fitviewer.biz/files/file/doxijeloxegigega.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/5488854618.pdfIn PDF document text
    • http://smartpaintingplus.com/userfiles/files/tonafiguxasorara.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/kurelazavose.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131814e6132f---fitaguxitareso.pdfIn PDF document text
    • https://kiptep.ru/file/tevaw.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/7024224946.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/merawajiroxafokokifugak.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/ramukuvamuwutuviginumulu.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132e42588a01---garadaxobekapitoligaso.pdfIn PDF document text
    • https://thebookonpersonaltransformation.com/FCKeditor/file/pugajabuno.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/87502337792.pdfIn PDF document text
    • http://nc-israel.ru/upload/files/fogokigirexorekexamafoge.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/96076371278.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=dc+comics+free+download+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_off00010629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10629 10768 bytes
SHA-256: 69c67e98aea52d7b27de1d509f3e5615af4df726a98491bc018af6c51ad044e0
font_01_sfnt_off00011eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEF 18320 bytes
SHA-256: e11bbabccce02de7a072566c6a8466dd3cfd88f179a971dad2cc6ec42adc5e92
font_02_sfnt_off00014dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1