Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f901f0fabfdea6d…

MALICIOUS

PDF

72.8 KB Created: 2021-03-23 15:59:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 73b0031e5af718c14f5f74fec0b70477 SHA-1: 5d25844a294befc9e2f4a637b5f19aa3039bed85 SHA-256: 8f901f0fabfdea6d214fb957ed2244b32d764149d54738a548c4307aac612a1d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=othello+act+1+review+questions PDF link annotation
    • https://cdn.sqhk.co/merabuvi/hifOQlV/bifesanafo.pdfIn PDF document text
    • http://kizisuruz.22web.org/phet_balancing_chemical_equations_html5_answer_key.pdfIn PDF document text
    • http://zonodejizifiti.iblogger.org/35171939283.pdfIn PDF document text
    • http://ligoturup.22web.org/69666554533.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404308/normal_5ff78f1b2f20b.pdfIn PDF document text
    • http://zinusefubowewet.22web.org/36363809872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466161/normal_602a3983a1dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423780/normal_6013cacf8ee79.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/dYMgj9K/five_heroes_the_king_s_war_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0219d88-a1f3-496f-a4e7-e38790304597/28695477051.pdfIn PDF document text
    • http://ritofeli.epizy.com/xatamibiromu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b5660f-0b5b-4b49-85ac-b2b0a8ab0a68/lakefoxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c8fce5-257a-41fa-bde3-a919f340aeb3/kitokifefif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35ec83d9-5447-4a36-a6e3-977d99f9cb47/what_is_the_tone_of_voice_in_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2549b2bd-3b3e-4cfd-b949-851990f45511/what_is_the_significance_of_religion_in_society.pdfIn PDF document text
    • http://samanoniminowut.epizy.com/88499250451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db028e9f-6f53-403f-9758-d1e06cd6cea5/caml_query_designer_for_sharepoint_2013_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d01cfe2c-2fce-415b-8c92-acd1ca2a1edd/les_miserables_movie_2019_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff3be5d9-5008-44ac-9483-c079a09c7a05/zesitiwuvikeforutaxase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d97c965f-025c-4baf-8c5e-2a914f7d0fc4/in_christ_alone_my_hope_is_found_he_is_my_light_my_strength_my_song_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ad2b52-6958-4e5b-b577-9221961a8fac/94503081127.pdfIn PDF document text
    • http://pavejovubebus.rf.gd/gelitubotade.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

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_off0000deed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 5244 bytes
SHA-256: 7a780628e409ee21c44a769fe7e5d0de820eaca27da60809718ddc66ab5f4204
font_01_sfnt_off0000f0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DA 10452 bytes
SHA-256: 99ee98d1bbf8d77efbfd37013e9d1511064e1d77bea24a5734d5e30d24a3c016

Open this report in the interactive analyzer, or submit your own file for analysis.