Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5577978bde78a5…

MALICIOUS

PDF

79.9 KB Created: 2021-02-20 12:53:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e18f70c024368dfcd01b307687d2ea2b SHA-1: dd9e711cff96c2bae76bdd256c60da1853da7af0 SHA-256: 0e5577978bde78a58abe4adf65f04b6b125c559da1cb6dc3a7829c0523e90272
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of multiple unknown reputation URLs strongly suggest a phishing or malicious redirection attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely serving as a lure to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=cuanto+es+7%252F8+pulgadas+en+milimetros PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456685/normal_6005631888b06.pdfIn PDF document text
    • http://trokot-new.online/12712009642kygsb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370541/normal_5ffa521a99be1.pdfIn PDF document text
    • http://artrosil.xyz/36794841842n6m7f.pdfIn PDF document text
    • http://eu-study.ru/diktat_b2_deutschhjah4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5fd98e1533789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497109/normal_6011ade3abb5e.pdfIn PDF document text
    • http://fofoketezifofi.22web.org/4286732660.pdfIn PDF document text
    • http://particulieres-societegenerale.best/siva_puranam_in_tamil33idg.pdfIn PDF document text
    • http://netewe9.xyz/ch_7_tv_guide_brisbanetupuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486552/normal_5ffe894a8dc69.pdfIn PDF document text
    • http://docita.fun/79935698666zc3hu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xugeseza.epizy.com/zuxafopov.pdfIn PDF document text
    • http://turegipamikum.epizy.com/bcom_full_form_in_kannada.pdfIn PDF document text
    • http://lesiterifok.epizy.com/badrinath_movie_mp4_songs_free.pdfIn PDF document text
    • http://mewudupite.epizy.com/canon_eos_rebel_t5i_user_manual.pdfIn PDF document text
    • http://vigaroxirari.epizy.com/zumoguxilisofi.pdfIn PDF document text
    • http://nipotozutawavi.rf.gd/29122380582.pdfIn PDF document text
    • http://bodasubosixo.rf.gd/90389551038.pdfIn PDF document text
    • http://gunubepixel.epizy.com/american_gods_cast_season_1_episode_1.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://scripts.sil.org/OFLIn 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_off0000d8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 5496 bytes
SHA-256: c2dd6abbac2e42421130635369c2034aec0e4526b5479c5475baaac661f8a1f0
font_01_sfnt_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 15516 bytes
SHA-256: 0543c5619a7e285f1772ac831da49f31c5452dd2e559699d3300557f9e510827
font_02_sfnt_off00011b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B66 16100 bytes
SHA-256: 01e49661dbdd7b4823267156d85e4b6ddc25a6de2ac0af4d78c137cfa2b371b1

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