Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e4c85e2096d27b…

MALICIOUS

PDF

86.8 KB Created: 2021-03-14 17:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 2c91925df7dba19c2d6a164f3a672748 SHA-1: 18b74200d87173399911e3302c772118fd6d5580 SHA-256: b5e4c85e2096d27b5327f07ce3172b95d39e72e879ee1db2547d836ab0fdd556
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely used to distribute malicious content or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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/wix?keyword=west+school+ptc PDF link annotation
    • http://nitiwopororotef.mypressonline.com/como_sacar_el_titulo_de_un_carro.pdfIn PDF document text
    • http://xawamiwupajev.mygamesonline.org/piano_sheet_music_for_beginners_popular_songs_free_printable.pdfIn PDF document text
    • http://roman-holidays.shop/kifinovodopimexezx26mj.pdfIn PDF document text
    • http://pamatidela.getenjoyment.net/mavovebeja.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/ASmhfam/silver_dollar_city_branson_mo_rides.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutesilo/e9ligjf/22989869649.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/ScHihgj/mazurevevopavi.pdfIn PDF document text
    • http://arenda-comp.space/the_natural_order_of_things_booke5dxd.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/fegorefemuromivi.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/0ZCiagd/1914183482.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/nurobeduzeranosibuvid.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/zgg74jf/pixuv.pdfIn PDF document text
    • http://nosinoski.shop/zenidobutujinvtqhk.pdfIn PDF document text
    • http://ruvinowuge.scienceontheweb.net/nolusepuzow.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/tenunud/abacate_informao_nutricional.pdfIn PDF document text
    • http://kijonag.onlinewebshop.net/ceclor_bula_250mg.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/ateistler_iin_din.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/joduxorag.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/wegovejematitabipi.pdfIn PDF document text
    • http://tipatanakuke.onlinewebshop.net/performance_management_system_in_hrm.pdfIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/nugutajatufetemuxatalabaw.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/central_nervous_system_ppt_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/82376732551.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_off000116bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BB 4728 bytes
SHA-256: 9a214d72aab7d4445fc00f218da935b7444a55d32f41b7a98821f90a1a95583c
font_01_sfnt_off000126e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E7 11864 bytes
SHA-256: f40b4a5847c6337d760b24a49ef756e495480d6c44fc65df9294d539ec6cabfd

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