Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0831d2f0005da0…

MALICIOUS

PDF

98.1 KB Created: 2021-03-10 01:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fe9c9d21412af87357231d526659c5c8 SHA-1: f1281cbeaa838c52dbdcba344dfbf4eab1086a4d SHA-256: 2e0831d2f0005da00ef232b56b4b5d2498f0de2c8e14a75117b9892690025801
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=mecanismos+de+muerte+celular+apoptosis+y+necrosis+pdf In PDF document text
    • http://summer-italy.fun/why_has_my_oven_light_stopped_working2xbf7.pdfIn PDF document text
    • http://zavodtriumf.com/pamokumapuvupenukatozzo8f.pdfIn PDF document text
    • http://it50off.pro/software_testing_life_cycle_tutorialspointu9rrq.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/pijakenuvilafi.pdfIn PDF document text
    • http://byseles.xyz/bixosutomikokujero3hl41.pdfIn PDF document text
    • http://mailedflkf.site/communism_spreads_in_east_asia7xlqg.pdfIn PDF document text
    • https://baxorejo.weebly.com/uploads/1/3/5/2/135295822/xuxikage-lapuzug-pemuwogoju.pdfIn PDF document text
    • http://netekigupi.22web.org/vamotulegumid.pdfIn PDF document text
    • http://fashion-deals.xyz/theory_of_elasticity_timoshenko6yaxu.pdfIn PDF document text
    • http://1cats.space/follow_up_sheet_meaning2o2pe.pdfIn PDF document text
    • http://siloxolilalapas.22web.org/68366875435.pdfIn PDF document text
    • http://nicepics.xyz/neptunia_rebirth_2_stella_s_dungeon_guidex8dw6.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/fizaxo/gutorovapijifujesexex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b53fdb16-c70c-41e9-abf4-d5ca6444aba1/my_cuisinart_coffee_maker_is_clogged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0304ac4f-50ec-475f-a8bc-e263859605f8/nonokexi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/blechtrommel_buch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4301982e-a55d-4525-b843-d5ea4c913f43/menefulirafusekorukom.pdfIn PDF document text
    • http://mejusamenubeto.rf.gd/sinonimo_de_conforme_nos_falamos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e74d5da-f182-4fd7-9700-7c5eb26bbe97/que_opinion_tienes_sobre_el_aprendizaje_basado_en_proyectos_abp.pdfIn PDF document text
    • http://notavopanugatog.epizy.com/the_game_rapper_wikipedia_encyclopedia.pdfIn PDF document text
    • http://dejogamolefip.rf.gd/angular_formbuilder_group_disabled.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/19843770938.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/tifasabutakuluxef.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_off0001461d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1461D 5408 bytes
SHA-256: 901dd93680d3c7957aba84ef416f251e37c2c8a429d0d1a915bad62469081e0c
font_01_sfnt_off0001587e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1587E 9980 bytes
SHA-256: 8c2b1c5e0628736b796004522478de0d7b337aa7f03fab473055eb74e0882cd3