Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65e9742eae8780d…

MALICIOUS

PDF

74.8 KB Created: 2021-04-29 18:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2f3a1dd125e8613bb641085cda6953ea SHA-1: 1de81c5223bda61d72cb0741710acc30fb9abb8b SHA-256: b65e9742eae8780d7132f7dc5e76bd32a507e3bd6a9e4cbeb61ff8b6f3d070fd
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic firing indicating it functions as a link farm on disposable hosting. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the link farm heuristic suggest a malicious redirection or phishing attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=how+do+you+tigers+defend+themselves PDF link annotation
    • http://watertea.space/20754190272s857b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_6058e02bc629e.pdfIn PDF document text
    • http://azules.ru/assalamu_alaikum_arabic_naatr62x4.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/dribble_drive_offense_drills.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450259/normal_5fe85289dad9a.pdfIn PDF document text
    • http://rewita.fun/the_sound_of_colors1prkd.pdfIn PDF document text
    • http://instapriz365.online/chevy_ss_sedan_manual_transmission_for_salel5q30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483836/normal_60068f40981bc.pdfIn PDF document text
    • http://gufutaca1.xyz/vsco_mod_apk_for_pcx53mr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411683/normal_602924ccd4321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402944/normal_5fd13a343b175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371014/normal_603bbbb46d15f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kavuduvolilazod.myartsonline.com/thinking_skills_worksheets_for_grade_1.pdfIn PDF document text
    • http://duladujofivar.rf.gd/60_bus_schedule_septa.pdfIn PDF document text
    • http://redanewirejawub.epizy.com/75658515858.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/arabic_numbers_1_to_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36336b00-5899-4d7d-85a0-a1fb4f1645e8/mukogisogarotazu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de71212-fd03-4de5-a832-2c8630232490/what_are_some_examples_of_a_complete_subjective_description.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_off0000e7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 5324 bytes
SHA-256: dbe19cdf472edf7831afc541a5a93dc1fd7ec1af52ec0f4800fc0024af9c6add
font_01_sfnt_off0000f9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CA 10968 bytes
SHA-256: c06edf58f70e4db35a758ec74513f7f11b80dba64ff67a4304f8283429021556

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