Malicious PDF — malware analysis report

Static analysis result for SHA-256 39120f7d2b2026f4…

MALICIOUS

PDF

76.6 KB Created: 2021-03-11 08:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0fd2d630d47a46fc727072212d68b61f SHA-1: ea514a8a206629ad0e436d46b901684b9fe16bd5 SHA-256: 39120f7d2b2026f4cbe4d1cdf7ec71608566df3d46764cc311face83accff6e0
66 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier strongly indicates maliciousness, and the document's structure suggests it's designed to redirect users to potentially harmful external sites. No scripts were extracted, but the presence of external links and the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/award?keyword=administration+dictionary+pdf PDF link annotation
    • https://cdn.sqhk.co/sawowudin/ijeaaih/99678655550.pdfIn PDF document text
    • http://kagifosotumaden.iblogger.org/jadapolejifo.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/O3hh2hj/merriam_webster_vocabulary_builder_file_type.pdfIn PDF document text
    • http://fuxagiwowasiwu.22web.org/nomination_form_for_election_candidate_2019.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/what_is_the_meaning_of_the_negro_speaks_of_rivers.pdfIn PDF document text
    • http://rakapugijumub.sportsontheweb.net/garmin_gpsmap_76cx.pdfIn PDF document text
    • https://cdn.sqhk.co/dojatejij/7gfgiia/teacher_appreciation_quotes_short.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/6j8VYBi/ice_cream_roll_mix_recipe.pdfIn PDF document text
    • http://raduvilisakoxa.22web.org/xasaranizilovopevafu.pdfIn PDF document text
    • http://vinogesa.22web.org/lakebosejavejefokuminafo.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/how_to_catalogue_a_coin_collection.pdfIn PDF document text
    • http://ragadugizidej.22web.org/febupupelovinudap.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/jetQ9jg/sesopulurufafil.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/what_are_the_writing_methods.pdfIn PDF document text
    • http://puveputado.sportsontheweb.net/dungeons_and_dragons_5e_zombie.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/2546ac91-c391-4e1a-9fed-8078ebec9470/insinkerator_parts_breakdown.pdfIn PDF document text
    • http://rexefobixavater.myartsonline.com/bigisazobudifeludevej.pdfIn PDF document text
    • http://desakoda.rf.gd/84331861844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be89674c-7bba-4e59-8e33-eea56ed51d40/list_starbucks_menu_philippines_frappuccino.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/zigijozami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1cab51-3b6a-4321-a856-ec86f46719f3/tabla_de_densidades_de_diferentes_sustancias_y_materiales.pdfIn PDF document text
    • http://vulomalizekuvu.rf.gd/barfi_songs_ringtone.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_off0000ef25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF25 5360 bytes
SHA-256: 8f727db423164057eb4d9d7928961c88c8aae60c37b7c3d69f1ed8dc6fb58223
font_01_sfnt_off00010154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10154 10436 bytes
SHA-256: ec6f5d7f0a3892679c3121482918f425c8052c1abd366271ad14eda7c3a17b13

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