Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eeb09a843d41fe5…

MALICIOUS

PDF

82.9 KB Created: 2021-09-17 03:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b1b680fe703c3fdfd80d66920ee76d29 SHA-1: d5d29c2c324595576c8064f5d0918b4c54237e58 SHA-256: 4eeb09a843d41fe5a5cb3deebff530aab382bfa206c4c556407988393a325bdb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of a link farm with numerous disposable URLs, including one pointing to 'ping-property.com', suggests a phishing or malware distribution scheme. Although no scripts were extracted, the overall structure and heuristic firings point towards a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ping-property.com/user_img/files/nojuvuguj.pdf In PDF document text
    • http://yongqingtech.com/d/files/kesunuzikumiravojazekiv.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/fagisijinikulatozil.pdfIn PDF document text
    • http://cochemical.com/upload/files/diluxisemajojer.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/fobura.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/fisimiruwewa.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/35982727464.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/jujidelumivugujotovugufut.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/rokejafapejitebuwelebofe.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/dusofuwukagib.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/fodedawekevelita.pdfIn PDF document text
    • http://diadiemvui.com/upload/files/fojerunevun.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/luwuwufagukivaraliluzer.pdfIn PDF document text
    • http://hstairan.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/85297861232.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/32818489233.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/dojemopijafo.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/lokobenizezadijifunu.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210911080121_l4i6va.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/zopasosipejokepawovuz.pdfIn PDF document text
    • http://szcftz.com/upload/1973091102.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/f035f6a02ac0ddd15657e0aa3063ecae/xuxejoxiji.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/ruxumumesupafosovirumalib.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/bolix.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/32741236564.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/540a4aea1d27b3688687af5e209dac10/16429142851.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=download+smarters+on+firestickPDF 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_off0000dd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD37 10816 bytes
SHA-256: d3a78a948893c93b7e53061908c3d7c791ca4ee7411d4e00751c27d88baacf6e
font_01_sfnt_off0000f638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4A 18232 bytes
SHA-256: 83a6b0869f33d6a47bee807935a79e15a60a9608e37ab5b17de2090cadf6166a