Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ec015c667508b2…

MALICIOUS

PDF

77.0 KB Created: 2021-03-16 05:35:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f0db7fbc7e8e2d29d6e897d16fdf443c SHA-1: 38dc073421e8d854a7c29a08ca26788c851cebb0 SHA-256: 52ec015c667508b2b6d529566e199128de8f22d3d210cae963acb246ca51fc33
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for redirecting to known malicious infrastructure. The embedded links, such as 'https://dafemum.ru/strik?utm_term=how+to+make+money+in+cyberpunk+2077+early', are designed to lure victims to potentially harmful websites. The ML classifier also strongly indicated maliciousness, supporting the phishing and redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=how+to+make+money+in+cyberpunk+2077+early In PDF document text
    • https://lolifibek.weebly.com/uploads/1/3/4/6/134634661/xonosonisadopo_lolugawur_zenexigamubi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497650/normal_602470c2db018.pdfIn PDF document text
    • http://vienvozvrat.site/el_amor_en_los_tiempos_del_colera_pelicula_resea8weso.pdfIn PDF document text
    • http://reznitskygallery.com/price_of_casio_edifice_558gfdw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_600f13c607ca5.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/73833938534.pdfIn PDF document text
    • http://icily.xyz/nefuxokonfkdsn.pdfIn PDF document text
    • https://zisojuvamifofe.weebly.com/uploads/1/3/1/3/131383842/7d113bbad.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/zuduvujegol_fuzurexelub_kipiliz_wumuw.pdfIn PDF document text
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/pajagezobuxuvo.pdfIn PDF document text
    • http://shimano-stradic.ru/rikujobim8r5z6.pdfIn PDF document text
    • http://axecheat1.xyz/jenekedexaep99p.pdfIn PDF document text
    • https://xapovakugad.weebly.com/uploads/1/3/5/3/135393008/7021695.pdfIn PDF document text
    • http://wrinklestiltskin.com/baofeng_uv-5r_plus_istruzioni_italianops79a.pdfIn PDF document text
    • http://wide-mean.top/lg_hbs_912_pairing4yus5.pdfIn PDF document text
    • http://the-glow.ru/conical_pendulum_experimentxb6b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413573/normal_60199937553a0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jisijuvod.myartsonline.com/58862182087.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbb99cfa-c5e9-4194-8d91-978aadc515e8/7700806830.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef7e2ff7-681c-4208-9905-316ca2ae588d/wosikamexolaroduni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b00d60a-b42f-4ecf-a8b2-477b333368b3/92201440494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/888201f7-b5b0-42b4-93e3-73c7617a9c79/how_much_does_a_steel_beam_cost.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_off0000ef18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 5612 bytes
SHA-256: a5fa6f3b3907f877a4e52674ebd81aa939b08044e8289cfa11ae81bbb4e12136
font_01_sfnt_off00010230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10230 10688 bytes
SHA-256: 7666c2ce86b47f75b72b105c990eff282cc33bafd64638badc494718cdca1644

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