Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d03a3b501017909…

MALICIOUS

PDF

81.7 KB Created: 2021-03-28 09:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: da3652c0dae2caab6316794fb9168291 SHA-1: a83659e75b2117213aa948a04f92ab4f290c6130 SHA-256: 5d03a3b501017909f0abfd19c6a36cc09bd746840cd9b2a203e702718cefdd86
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable hosting services, and is flagged by ML classifiers as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy to distribute links across many domains, likely for SEO manipulation or to evade detection. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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://seumenha.ru/wix?keyword=medical+school+survival+guide+pdf PDF link annotation
    • https://xorexataziz.weebly.com/uploads/1/3/4/4/134496469/d772d0df2d71.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/lupaxibeginusozusox.pdfIn PDF document text
    • https://lixobanifalito.weebly.com/uploads/1/3/4/4/134443724/5588767.pdfIn PDF document text
    • http://prizinsta365.website/cute_background_for_ipads90tdg.pdfIn PDF document text
    • http://itclick.pro/6th_grade_grammar_practice_worksheets7zslc.pdfIn PDF document text
    • http://openlait.pro/arc_measures_worksheet_answers7imd9.pdfIn PDF document text
    • http://cashtanks.fun/sherlock_holmes_3_full_movie_in_hindi_free_download_480pg5z5j.pdfIn PDF document text
    • https://nesupopokajore.weebly.com/uploads/1/3/5/3/135394324/tasidenin-zujodarusakukez-gudikivun.pdfIn PDF document text
    • http://mukovasisoro.mygamesonline.org/94648933971.pdfIn PDF document text
    • http://alteramaks.world/86557427110wuk42.pdfIn PDF document text
    • https://numezuledidi.weebly.com/uploads/1/3/4/0/134096646/276820.pdfIn PDF document text
    • http://1xbet-regi.site/84135472543a86pe.pdfIn PDF document text
    • http://autoupgrade.website/best_face_shield_respiratorlhmup.pdfIn PDF document text
    • http://lezofifividex.scienceontheweb.net/arduino_uno_r3_download.pdfIn PDF document text
    • http://center-about.com/acer_aspire_e15_display_price_in_sri_lanka6wl5r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fulazelof/auricular_deformity_icd_10.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_5ffa495a260f4a3bae3be2e23cc277ee.pdf?index=trueIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_a581a7bbb7ec495ea6b474967bed16dd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/why_hp_envy_battery_not_charging.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/nefef.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/meximabagevigudikev.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/affidavit_for_date_of_birth.pdfIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_727f6b7841874fedb7b436816caad87f.pdf?index=trueIn 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_off0000ffdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDB 5480 bytes
SHA-256: 267fe9e23ffb9b29bf56274073e669a0fd8e0c6dcee21d8521282871f9fe0dbb
font_01_sfnt_off0001128f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128F 10836 bytes
SHA-256: 4f4c5eaa4fbffcbce4d664a729081159210574c9ec9bb76730ebb905dc47fd5d

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