Malicious PDF — malware analysis report

Static analysis result for SHA-256 6957ea9d97944c29…

MALICIOUS

PDF

87.9 KB Created: 2021-09-19 00:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a66a513396bf96251b5dd7da87e678d SHA-1: fda81e0cbb3f8f0b83d2016ca703543f90ec2b7b SHA-256: 6957ea9d97944c29a31c0f8eb756427b45fdaf50021c9638b7557da3cf4461e9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document exhibits characteristics of a link farm, embedding numerous URLs disguised as search results for popular topics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/6407bc724585ec370382a9116cf5ba44/tefeko.pdf In PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f448ddb7c7---62437198809.pdfIn PDF document text
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/dobul.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/muxunexusod.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/84160914259.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/40674612087.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/sibugi.pdfIn PDF document text
    • https://keepingscore.org/userfiles/file/dovuwedosodozukalifipaga.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/biguwe.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/gubuxawaziv.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/79381893580.pdfIn PDF document text
    • https://bawauang.com/contents/files/sonof.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/81057690039.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210912022005.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/55999306150.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/52390162641.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/fusudedozewoduzupixibasob.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/nupepomod.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/67568835441.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/24226147512.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/36940756752.pdfIn PDF document text
    • http://nbc.ua/design/pic/file/16056140117.pdfIn PDF document text
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/99728283790.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=pokemon+fire+red+cheat+list+downloadPDF 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_off0000ecbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBD 10920 bytes
SHA-256: e16fe847522c4f165f369b80234a935031e7a5ce15a7a202e5defa0e71761160
font_01_sfnt_off000105e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E4 19700 bytes
SHA-256: ba02fb27b3625eb22ae717dd7334076f66ad7908090f41f0df968b525e23b9ab
font_02_sfnt_off00013a15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1