Malicious PDF — malware analysis report

Static analysis result for SHA-256 524763dd64d8f27a…

MALICIOUS

PDF

82.5 KB Created: 2021-03-01 03:11:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: a2d25e7cbf7d984db7de3e1d210b3dbb SHA-1: 737468805d2555fc12214707adaaefe66742adb3 SHA-256: 524763dd64d8f27ab61e99bb06c3fb1bcb1a607d26cd5cbde2d04d01d9450219
126 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm or phishing attempt. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification strongly suggest malicious intent. The presence of embedded URLs, even without explicit script execution, points towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://xajibur.ru/wix?keyword=child+family+and+community+7th+edition+pdf PDF link annotation
    • http://sidufapas.mywebcommunity.org/el_amor_en_los_tiempos_del_colera_pelicula_completa_hd_latino.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/hp_p2035_service_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fe4836dd91e6.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/rascal_600_scooter_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/lakuxezaj/FhjzZge/vision_direct_contacts_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/jdhjXIb/best_online_soccer_retailers.pdfIn PDF document text
    • http://delinapod.mypressonline.com/how_to_solve_radioactive_decay_problems.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/lord_of_the_rings_cast_elf_queen.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/5shaihk/remuxinisevenebumidit.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/how_do_i_record_accounts_receivable_factoring.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418166/normal_602ae3e02e43f.pdfIn PDF document text
    • https://cdn.sqhk.co/gupimupiset/c8kIHwK/pobaxumovivilojiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426059/normal_603c360b44b41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412160/normal_5ffd30bbdd49d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuxixatizoxop.epizy.com/40289156910.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/the_holy_quran_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/2019_chevrolet_colorado_z71_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/rahul_ji_name_ringtone.pdfIn PDF document text
    • http://bodufusuviv.epizy.com/what_is_esperanzas_last_name_in_the_house_on_mango_street.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/nadikalalima.pdfIn PDF document text
    • http://jujobope.atwebpages.com/list_of_constants_in_physics.pdfIn PDF document text
    • http://gatapin.rf.gd/20023324519.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/carl_zeiss_ag_annual_report_2016.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08D 5208 bytes
SHA-256: 48b4d552e8b318e3c64359c62b23add3047d042b2d6c621ceb612b43a6626739
font_01_sfnt_off00010233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10233 10740 bytes
SHA-256: 3e6c62ad85eae840b8af88791e615e5fa6c9ba544863f0a6b4e4fd0e9a93a8c9
font_02_sfnt_off0001271f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271F 16084 bytes
SHA-256: 462d13bd97d7d9b38b38dac4ddb889f891d4742debcdf3bbf084b15d68e01d41