Malicious PDF — malware analysis report

Static analysis result for SHA-256 129ceda362ab7273…

MALICIOUS

PDF

95.7 KB Created: 2021-03-07 01:59:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 1790fd04d7f3190662dabdba197c7f03 SHA-1: 72824717285dc36faea45572ef9919a45c6a2030 SHA-256: 129ceda362ab7273e4a3204438bec3d401c3efc4ee5584b9a579398fe6e3631b
134 Risk Score

Malware Insights

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

The PDF contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The 'SE_INVOICE_LURE' heuristic suggests a deceptive pretext, and the presence of multiple external URIs indicates an attempt to redirect the user to malicious sites. No scripts were extracted, but the PDF structure itself likely facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://xezojetit.ru/wix?keyword=yamm+mail+merge+instructions PDF link annotation
    • https://cdn.sqhk.co/gitovera/guSwTjf/sumewesaxeru.pdfIn PDF document text
    • https://lolorude.weebly.com/uploads/1/3/0/7/130775760/4207494.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/war_of_the_worlds_2019_tripod_sound.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472768/normal_603ce1a5424d2.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/best_photoshop_books.pdfIn PDF document text
    • https://tifimiwarefimi.weebly.com/uploads/1/3/4/8/134895051/4836623.pdfIn PDF document text
    • https://rekasefuwe.weebly.com/uploads/1/3/0/9/130969231/deduripakene-tewesozasuluja-pavokosapu-gupeto.pdfIn PDF document text
    • https://cdn.sqhk.co/lawipavoso/fsJGerz/business_plan_definition_tutor2u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_6022e2be983ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464865/normal_5fecc6b59ab17.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/vakirunoligufejivir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_603a8f6f7f49f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_603fe9e637754.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462096/normal_5feb18c2e6688.pdfIn PDF document text
    • http://luxasireku.sportsontheweb.net/kibizob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b92320d-a4ea-4935-9f6f-cdbb26da585e/focusrite_scarlett_2i4_manuale_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d4b96e0-6fa8-4388-8176-da80534b4db7/wordpress_redirect_user_to_specific_page_after_login.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/what_are_the_methods_in_social_psychology.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 4348 bytes
SHA-256: 7a68e0a374b13ce4fc1843d5bd83951dfa24db5a1609023d75d240d157c1dd9f
font_01_sfnt_off00010e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6E 5080 bytes
SHA-256: 7b90e67e2a4ab1961f0fa3026beb4fc98947bb9dd17cb67ce1596c18b05d5bc3
font_02_sfnt_off00011f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9D 12800 bytes
SHA-256: d498cb73dbd73b1c0fe642309b083014554927e32f74679be36122214d5d7624
font_03_sfnt_off00014a03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A03 17184 bytes
SHA-256: 0e14de8ebdbbe548890efca9d91d0771b0cf74dd793dba7c1eb9afdd3c113177
font_04_sfnt_off00016359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16359 3432 bytes
SHA-256: e0fd0490ab9470513b8d2b1b8d7992f25ed09c0bde43ea5eb2d216e8b7aecf6a