Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a498a701079c1d4…

MALICIOUS

PDF

79.2 KB Created: 2021-03-21 04:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b1c5ee08f708aac507875546c616cebb SHA-1: d7ff1c83ea8a1560028bcb8deca45aadcc6f3ffe SHA-256: 0a498a701079c1d436cd2065d9448375eb05c3978f9e21b15c14cee4c2de1010
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 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://nipisod.ru/strik?utm_term=how+to+work+out+cylinder+volume+in+litres PDF link annotation
    • http://lngcliente.com/10710956359ne2d7.pdfIn PDF document text
    • https://cdn.sqhk.co/zigotimuti/l0ihggU/55306416653.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/what_is_the_meaning_of_long_run_cost_curve.pdfIn PDF document text
    • http://nusezuretoti.scienceontheweb.net/sadonezuxalibixubuf.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/yamaha_mixer_mgp32x_fx.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/microprocessor_assembly_language_programming.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/procalcitonina_elsevier.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/bWgfe7b/31817892541.pdfIn PDF document text
    • http://accueilcmb.com/how_to_start_a_compare_and_contrast_essay_examples61beh.pdfIn PDF document text
    • http://barajofa.mywebcommunity.org/46093522761.pdfIn PDF document text
    • http://mkuu.club/fall_planting_guide_zone_7awxf82.pdfIn PDF document text
    • http://all-gopro.com/690006911328ye7h.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/pitney_bowes_postage_meter_instructions.pdfIn PDF document text
    • http://gomigapujasep.sportsontheweb.net/ganejaxawatujumetiku.pdfIn PDF document text
    • http://sewakasatixori.medianewsonline.com/agricultural_engineering_technology.pdfIn PDF document text
    • https://cdn.sqhk.co/mugegiduveb/U0jgYoS/bloons_tower_defense_1_cheats.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/cours_anglais_gratuit.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/the_wicked_king_series_order.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/ihSEjdp/27003852584.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fibidoje.epizy.com/manual_baofeng_uv-_5r_portugues.pdfIn PDF document text
    • http://litabasiker.onlinewebshop.net/lutewibuvifas.pdfIn PDF document text
    • http://fakozavovenabe.rf.gd/kudiline.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_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 5156 bytes
SHA-256: 8741994cd7808dd7f9ad89863de937baa0c7d1e921aedb86d1fb2098e335b9ba
font_01_sfnt_off00010649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10649 11292 bytes
SHA-256: 31f1c53f2b5738f6476f1bf6c8e7d32b520736af791073620d8bc670a0263670