Malicious PDF — malware analysis report

Static analysis result for SHA-256 26a4877d895f3c00…

MALICIOUS

PDF

76.8 KB Created: 2021-03-01 11:58:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4c34c33939be7e26c44d131ea0f4991f SHA-1: de84e558c6c265dba5f0c50800bb98b7d00c2be4 SHA-256: 26a4877d895f3c0057a43d0da6f998d621cab6eb9fea62c954b9f10b3c30e422
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/award?keyword=plot+summary+of+the+pit+and+the+pendulum PDF link annotation
    • https://cdn.sqhk.co/xutazazo/IEAieii/nubudo.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/UxtV1dD/68411091817.pdfIn PDF document text
    • http://mizagoride.iblogger.org/is_the_driver_license_written_test_hard.pdfIn PDF document text
    • https://cdn.sqhk.co/sodelaranu/fjjihhb/uphill_rush_6_unblocked_weebly.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/what_is_myp_ib.pdfIn PDF document text
    • https://cdn.sqhk.co/jopuromug/fjjX0he/bewuzidenew.pdfIn PDF document text
    • https://nodifolosorak.weebly.com/uploads/1/3/4/7/134758422/gewuturove-vunakogofonade-tazaw-lekenusuligeda.pdfIn PDF document text
    • https://cdn.sqhk.co/lepowabog/jfghnhc/54949804236.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/which_of_the_following_accounts_would_not_appear_in_a_closing_entry_net_income.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/harman_accentra_parts_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/nizaveni/gdpifJ2/danish_music_awards_blues_2020.pdfIn PDF document text
    • http://vanesifonemume.22web.org/trees_joyce_kilmer_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liwafo/sebi_guidelines_for_credit_rating_agencies_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/fuzosutuz.pdfIn PDF document text
    • http://boxogegifenefi.epizy.com/ximupelumuz.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF196 5384 bytes
SHA-256: b4abf77b013794dcc28fbaa1aac3e8fadb95bc6ce9f6dd3a664ae8793de861ca
font_01_sfnt_off000103bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BF 10152 bytes
SHA-256: 4ceccd1fc41a8ac7f5e35f7ff036be08d6c47984ca0ecaaf29bfa9348ac3dfe8