Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0e211cfea891a2…

MALICIOUS

PDF

76.5 KB Created: 2021-04-02 13:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cbfcd1ef937f42369115e962cefc2fd2 SHA-1: ef093c579bacbece7855dcc1568aa09f4f07d57c SHA-256: cd0e211cfea891a201fe71aa73cc16db36f6c75744ad756d07451102b90dcd18
184 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for malicious redirector links and a high ML score. The embedded URLs point to numerous disposable domains, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the nature of the heuristics and the presence of many URLs indicate a likely intent to redirect users to malicious sites, potentially for malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=d%2526d+monster+manual+pdf+3.5 In PDF document text
    • http://profapp.pro/how_to_change_cutting_blades_on_husqvarna_riding_mower1tjrk.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/musixefefapifalidukadtfgr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477877/normal_5fffff4d75cb0.pdfIn PDF document text
    • http://persequenteamsohbet.com/dell_optiplex_gx620_sound_driver_download_windows_7klixv.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/kitchenaid_food_processor_3.5_cup_walmart.pdfIn PDF document text
    • http://pojemapeva.22web.org/tinosiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415740/normal_601ad343c3905.pdfIn PDF document text
    • http://mapitunokon.22web.org/faostat_2020.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/wawoxekawuzuvotu.pdfIn PDF document text
    • http://tobolekes.iblogger.org/development_administration_definition.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/kujanape.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366633/normal_60046f4997b95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poradenojipedu.rf.gd/formal_email_format_o_level.pdfIn PDF document text
    • http://desibevazivoxan.rf.gd/36271228995.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/thai_visa_on_arrival_application_form.pdfIn PDF document text
    • http://bofidimasep.rf.gd/75612530248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/887664a1-a368-4eeb-95ff-49c6f6ebc4c6/how_to_grow_lettuce_from_plant.pdfIn PDF document text
    • http://kozuwuwupoxofi.rf.gd/dba_interview_questions_and_answers_sql_server.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc55f493-68ac-493f-8644-9d0de240a760/windows_movie_maker_app_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45ac592b-476b-4b13-99e6-422863644757/are_the_witcher_books_objectively_good.pdfIn PDF document text
    • http://mibofive.epizy.com/mandated_reporting_in_pa.pdfIn PDF document text
    • http://vuwadiwotaja.rf.gd/eats_shoots_and_leaves_reading_answers.pdfIn PDF document text
    • http://muropep.epizy.com/loxezegiwuwuko.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_off0000f2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CC 4156 bytes
SHA-256: 5ae3bcc49c87f96444fbe3d11ff27db43b6aea299416b9f3d286273c64098da8
font_01_sfnt_off000100fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FA 10612 bytes
SHA-256: f3a25bda3635df85fe2cbd0fd88647c45561dde2285d8effba354f8492ecc800