Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b0ddad469860d4…

MALICIOUS

PDF

67.6 KB Created: 2021-02-28 10:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2f9e2d976bee08146d3fa4bfd90ff3ef SHA-1: 1e26723e73f042efb95fc8eceb539ac27c2f5b3e SHA-256: 87b0ddad469860d40810a6004d0fde0f02bec1dfaa913e9b2b55ddc5692e0b13
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/wix?keyword=sublette+county+school+district+%25231+salary+schedule In PDF document text
    • http://bapitafi.22web.org/91173094495.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/everstart_maxx_3_amp_6v_12v_automotive_battery_charger_bc3e.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/how_to_draw_a_dog_realistic_step_by_step_easy.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/what_are_the_elements_of_a_horror_story.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/can_you_name_all_50_states.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/67303243745.pdfIn PDF document text
    • http://mexicotop.xyz/how_to_clear_memory_on_braun_thermoscan_4520oon7z.pdfIn PDF document text
    • http://chebsvet.ru/bond_energy_pogilgafgp.pdfIn PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/8011427.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/luvaxuleranemikemibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://porugunime.epizy.com/senior_graphic_designer_resume_summary.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/buvutaterijexadipirovodu.pdfIn PDF document text
    • http://kozuwuwupoxofi.rf.gd/dba_interview_questions_and_answers_sql_server.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/6431945735.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/bigoxero.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_off0000cca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA1 5164 bytes
SHA-256: 13fa847f22d3f6fa227bb54bff22370057dc6c8aee26a8fddf4f0678117d690f
font_01_sfnt_off0000de28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE28 10332 bytes
SHA-256: 105388d39324c57348b599f537a9fb41d97acddb9513c9a22d6b4f6c055a07a5