Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2596933134afc54…

MALICIOUS

PDF

75.5 KB Created: 2021-03-16 18:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 47024e4c65c8f599147fb86e3b6af601 SHA-1: e793a1ff2357fcd3fbd6eff5c509e8090c851adb SHA-256: e2596933134afc54ade9a383a55d5d09b0628a94bc90d9d02d8c33c7289dfe21
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it functions as a link farm, with one prominent URL leading to a site offering a download for 'Fl studio mobile download'. This suggests a phishing or social engineering attack aimed at tricking users into downloading software, potentially malicious. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • 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://botokaw.ru/strik?utm_term=fl+studio+mobile+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486061/normal_604f48ad8d128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474465/normal_60447411b59f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_603a2a909751d.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/nyn8U0f/kowesifodopasezogedize.pdfIn PDF document text
    • https://cdn.sqhk.co/seranowe/z4ghhak/2574957539.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387810/normal_5fec52263ff3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_6037a46d1e32e.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/xjgijge/word_craze_level_763.pdfIn PDF document text
    • https://cdn.sqhk.co/labojime/jChjiFf/dhoom_2_trailer_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_603f35982e497.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8734470b-81bf-40ea-9d71-488478e11071/whirlpool_gold_series_double_oven_cleaning_instructions.pdfIn PDF document text
    • http://gelonixaj.rf.gd/9835063591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ae26fa-4e08-4d10-a74b-6a564f4d71fb/videri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54ffccc-a032-4fcc-9b9e-5429d2f9b022/tipos_de_comunicacion_humana_intrapersonal_interpersonal_grupal_colectiva_masiva_simultanea.pdfIn PDF document text
    • http://rufofexejojar.epizy.com/88603745389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7dde664-cdfa-4c01-b69d-f87fe6472540/tejasakejogikitugoretos.pdfIn PDF document text
    • http://kavagisere.epizy.com/personnages_principaux_a_la_recherche_du_temps_perdu.pdfIn PDF document text
    • http://foxabivezafese.rf.gd/tufezuva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d561bd0c-cdea-401d-9fd1-12ff240f45fa/how_to_install_correction_tape_on_a_brother_sx-4000_typewriter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e0a2aae-9652-4926-902d-640a3d9a36bc/pazajagezewolowusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/913dfab3-583b-49cb-bbdd-f638abf3272a/gigizigosegeworikipo.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_off0000ea23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 5060 bytes
SHA-256: 8863e815d3b33403cc8bcf4c820b4db2715585fe89fe4cc2f35f76de4d197263
font_01_sfnt_off0000fb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB56 10612 bytes
SHA-256: 3ba91a372f8096cc93b7dfab236436c7c5ca27cd7fd8442acbb4a36ff053f9c0

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