Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c83657a368e031…

MALICIOUS

PDF

87.3 KB Created: 2021-02-25 01:22:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5ef75873c47a69561dc45745eb5505e5 SHA-1: e5ae70ac22cd20da9412234e0c45d106037667f9 SHA-256: 15c83657a368e03172eca55c9d63c48fb81548ac1d1e3ebccff4a86a088b36e1
126 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, appears to contain keywords related to product manuals, indicating a pretext for directing users to malicious sites. No scripts were extracted, but the presence of external URIs and the overall heuristic profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/award?keyword=toro+snow+blowers+parts+manual PDF link annotation
    • http://pagebake.com/grohe_faucet_replacement_partsqh73r.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/software_testing_jobs_in_canada_quora.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/19757247992.pdfIn PDF document text
    • http://mnogolidov.xyz/347997950521uflv.pdfIn PDF document text
    • http://shtancircul.site/tascam_dp_006_power_supply3rpra.pdfIn PDF document text
    • http://femusawar.iblogger.org/acrylonitrile_msds_sheet.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/hp_laserjet_p4015_manual_feed_error.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/basic_english_worksheets_for_spanish_speakers.pdfIn PDF document text
    • http://proita.space/xidedujifawumi6iqiw.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/how_gm_diet_plan.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/how_much_does_it_cost_to_repair_a_catalytic_converter.pdfIn PDF document text
    • http://formulamoney.top/phonics_worksheets_printable_first_gradej5r01.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/how_do_i_log_into_my_cloud_key.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/91942459017.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ladibemotivusam.epizy.com/escape_room_answers_level_91-_100.pdfIn PDF document text
    • http://pebimomedunuzux.epizy.com/registration_form_in_html_with_css_w3schools.pdfIn PDF document text
    • http://wodebupikeziv.epizy.com/friends_piano_sheet_music_letters.pdfIn PDF document text
    • http://zipojadutaxu.epizy.com/79244690779.pdfIn PDF document text
    • http://dupivet.epizy.com/hackerrank_questions_and_answers_python.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/astronomy_and_the_relativistic_doppler_shift_mastering_physics.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFA 5148 bytes
SHA-256: 3c4235be2ef5725da2a8dddde18f8d02e27700d1b3723fdded9783e6da7ddcdb
font_01_sfnt_off0001306d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306D 10440 bytes
SHA-256: 4f3929f5e795a64394656131f91d49ed43388fceab72e30bf44844c0d3b8abd4

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