Malicious PDF — malware analysis report

Static analysis result for SHA-256 5989ab76772b1c57…

MALICIOUS

PDF

142.9 KB Created: 2021-02-28 12:14:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b607b1b738b7762d2966c77fa39684eb SHA-1: 11bd5a3634d5680bc81ab03c92f4a692e838b2ec SHA-256: 5989ab76772b1c5775e11a1ced1abc560520c3aa58a0d7ccccb3abaffb2f5c4d
184 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded links, such as 'https://dafemum.ru/strik?utm_term=who+invented+electric+bulb+wikipedia', are designed to redirect users to potentially harmful sites. The document's structure and embedded URLs suggest a phishing or scam attempt, likely aiming to exploit user curiosity or urgency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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=who+invented+electric+bulb+wikipedia In PDF document text
    • http://waranijovuv.sportsontheweb.net/kenmore_series_600_washer_error_code_f6_e3.pdfIn PDF document text
    • https://menufaron.weebly.com/uploads/1/3/0/7/130775522/rurunoki.pdfIn PDF document text
    • http://loxalidigitoja.iblogger.org/omega_juicer_model_8004_parts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414487/normal_60072f225a378.pdfIn PDF document text
    • https://velonifiwivuli.weebly.com/uploads/1/3/0/7/130739758/712f8.pdfIn PDF document text
    • http://dafusunefu.iblogger.org/netgear_wnr1000_v3_specs.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/38131200578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5fdc1ab0ba779.pdfIn PDF document text
    • http://netewe8.xyz/what_is_the_best_electric_recliner6d5hk.pdfIn PDF document text
    • http://brumbum2.xyz/ninoputubijudajigzftvh.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/pobuzakivararetid.pdfIn PDF document text
    • http://ranomurivokav.22web.org/sudelojorenujapasideron.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kemibibej.rf.gd/el_espiritu_de_dios_esta_en_este_lugar_acordes_en_mi.pdfIn PDF document text
    • http://sipanokule.onlinewebshop.net/38729504457.pdfIn PDF document text
    • http://vurasoda.rf.gd/xobudejigumutawokel.pdfIn PDF document text
    • http://rarixigowof.epizy.com/97278099101.pdfIn PDF document text
    • http://gurunetotej.rf.gd/34035732620.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C743 6072 bytes
SHA-256: f6cf18f332f1a4871fd5b9d095f65e51ea01e4bb12a531ac73b53dd76f71ad52
font_01_sfnt_off0001dc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC1F 5352 bytes
SHA-256: 697d2c2d9200d913054154c5909f462cc2781eab7d9584580aeb64fc203231ea
font_02_sfnt_off0001ee62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE62 13288 bytes
SHA-256: 7f458d65a94dc41497d023c4727d04d0090240a7af3bb81052e1c927468b13d2
font_03_sfnt_off00021808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21808 16172 bytes
SHA-256: 526177ef816c6165251276cba9d37c9cde58c758a098f93fabcc535992017e36