Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cde1c21de12b8c6…

MALICIOUS

PDF

85.1 KB Created: 2021-03-01 02:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 072b74093852bcd7854ecfa47cab4c9c SHA-1: 8fff0c1b2bf30e6a44912ba38202cd22cf4b00e1 SHA-256: 7cde1c21de12b8c681d3beff9d1b3d7123266b485af492a9cbcb07d1ee67ec2a
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 structured as link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, contains references to 'Tokyo ghoul season 3 episode 6 summary' and 'wkhtmltopdf', suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xajibur.ru/123?utm_term=tokyo+ghoul+season+3+episode+6+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383579/normal_6025e6314bc70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490738/normal_603443ad35a93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481852/normal_600634d14029b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_60183bce0f4e5.pdfIn PDF document text
    • http://bonus332.site/facial_diagnosis_of_cell_salt_deficiencies_a_users_guideqh3ri.pdfIn PDF document text
    • http://xakuneferufilew.iblogger.org/bewetexidepomefojobi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368782/normal_5fcbe0b342e40.pdfIn PDF document text
    • http://tujozavido.66ghz.com/14203860520.pdfIn PDF document text
    • http://sunshop.pro/81287277763286am.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492918/normal_602c00062fb2e.pdfIn PDF document text
    • http://sovetnik53.ru/50219254331ucwks.pdfIn PDF document text
    • https://pevolevu.weebly.com/uploads/1/3/1/6/131606362/jizexutadogobax.pdfIn PDF document text
    • https://zobaretax.weebly.com/uploads/1/3/1/4/131482953/fuxijix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482206/normal_601889a59c327.pdfIn PDF document text
    • https://balupelirotapos.weebly.com/uploads/1/3/2/6/132681476/b59a15.pdfIn PDF document text
    • http://nakanilo.club/kokebadegogato1ndt2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://devepovamijube.epizy.com/kisomezigifurop.pdfIn PDF document text
    • http://josekopiguvalup.epizy.com/application_form_for_passport_renewal_south_africa.pdfIn PDF document text
    • http://fojiguxojed.epizy.com/wetuvonilogitiz.pdfIn PDF document text
    • http://foxozokibi.rf.gd/respironics_bipap_auto_bi-_flex_manual.pdfIn PDF document text
    • http://vonezilomobupir.rf.gd/bhairava_telugu_movie_songs.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_off0000f3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FF 5804 bytes
SHA-256: 3e84545b8b5889a05b2deff4bc51a990b17ed5622ca5b8e3b51e56a7bce80c50
font_01_sfnt_off000107a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A5 11564 bytes
SHA-256: 15f47ece4fa236d6b76937a2f0b4761ba1cf46a99617d86a20fef8d6ff7d0aa3
font_02_sfnt_off00012ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE5 17484 bytes
SHA-256: 7ae904c4218a994f6b8900ac89822d20db0eeb2c027576c2fba54064f3466a5c

Open this report in the interactive analyzer, or submit your own file for analysis.