Malicious PDF — malware analysis report

Static analysis result for SHA-256 323881cb1cc9b8f3…

MALICIOUS

PDF

72.1 KB Created: 2021-03-03 07:57:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 03509561a3cc51b317cb3ffc38ef5cd5 SHA-1: 256a8b77e4ce2a0218bff7fec3f094d090c743d6 SHA-256: 323881cb1cc9b8f39dd143ee3ae8d918ec56a72810b3a16fdd9c95d3de275dfa
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=vintage+salton+yogurt+maker+model+gm-5 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4418368/normal_5fd9698e8878d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407991/normal_601e2b9de9eab.pdfIn PDF document text
    • http://honey-love.ru/nfl_game_tonight_point_spreadvx91y.pdfIn PDF document text
    • http://fezanabuxa.22web.org/zojadufobe.pdfIn PDF document text
    • http://uber-global.com/summer_infant_baby_monitor_not_connecting_to_camera32pys.pdfIn PDF document text
    • https://wisemawuperu.weebly.com/uploads/1/3/0/7/130738751/548658b9a8652a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454290/normal_5fd27f40f32c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383451/normal_60079c667f752.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dusalotiwuje.rf.gd/ccnp_security_firewall.pdfIn PDF document text
    • http://xivutunitilema.epizy.com/backdrop_mockup_free.pdfIn PDF document text
    • http://gixogofano.rf.gd/xusomumavalimi.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/60176998784.pdfIn PDF document text
    • http://xigofopaxedu.rf.gd/ancient_world_history_textbook.pdfIn PDF document text
    • http://xijovapafibowuw.rf.gd/jozodi.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_off0000ddf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF0 5432 bytes
SHA-256: 316158eaaff2b08599293b1817998f038adcf8e29b4faee6be6aaecdd4a67a39
font_01_sfnt_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 10272 bytes
SHA-256: 6585b01e348821c95c43684fce9b356f2c4d01efcd5fda083c16c5a16150ed73