Malicious PDF — malware analysis report

Static analysis result for SHA-256 384d9efc2ec691b2…

MALICIOUS

PDF

88.7 KB Created: 2021-09-10 14:32:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 2c80693e809c705e5293aa6023e0f4da SHA-1: b3d1ca30f5e2851c819e50ead5914e4f3272e283 SHA-256: 384d9efc2ec691b2332a87ed7a37a6bc643c0c91b95a2e2a6a2bd7d3268472ff
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, flagged as a link farm and likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the structure and URL patterns suggest a malicious PDF designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • 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.
  • 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://robodom.si/files_vsebine/77021070795.pdf In PDF document text
    • http://tiszaladany.hu/upload/file/71533220653.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/63974615612.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/wepodajisalemovu.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/xuluzivumo.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/07/file/20210907_041348_142.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315ba41068b---pogagisiwafiviberovuk.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/61964356835.pdfIn PDF document text
    • http://adria-ex.com/images/blog/file/nunixago.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/puxufeduseb.pdfIn PDF document text
    • http://levne-pohary.cz/UserFiles/File/2053986815.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/30621983611.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/xenifevejezidukixifipodu.pdfIn PDF document text
    • http://cauthangdep24h.com/upload/files/bijoxotutibegototami.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/fokigetegupetafobe.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/67530291888.pdfIn PDF document text
    • http://shinaval.ru/userfiles/file/59367104742.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/godaguvani.pdfIn PDF document text
    • https://machinex-machines.com/UserFiles/File/xepiwixejafetolapefinajep.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/nawumegoture.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/finolirijuzezazujivitasul.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/77198656349.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/gonawix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=jungle+cruise+full+movie+online+free+watchPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613530d9eb1bf---43807103794.pdfIn PDF document text
    • 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_off0000f609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF609 17628 bytes
SHA-256: e058fa7e7b23b6c902d7527d1d46a3a5b901b7e5f2af2cd6458bb8d72ee3041f
font_01_sfnt_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8C 11028 bytes
SHA-256: d3cd43e141d7ab224835205fec12848017b31b73d67d07c3908dce19b295b4e8