Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08c938d8b149b69…

MALICIOUS

PDF

78.1 KB Created: 2021-03-17 05:12:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1b279dd5b3dcb5a5e17a789ec26f9091 SHA-1: cd240b81d4eab50cd8acad97632c98d0d4e295a0 SHA-256: c08c938d8b149b69e7baaafd0c74e7da5948fb7d7e9710ab20a86351642cc183
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. It contains numerous embedded URLs, suggesting it functions as a link farm or phishing lure, potentially for SEO poisoning. The presence of external URIs and a link to a disposable hosting service further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/wix?keyword=go+math+grade+5+pdf+2018 PDF link annotation
    • http://jukexufepezaj.22web.org/bufifelijapisu.pdfIn PDF document text
    • https://cdn.sqhk.co/zodunoxurob/Pjcjchc/delicious_emily_s_road_trip_download_rar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446512/normal_6046ee99ac74b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478438/normal_601a1cf183f0b.pdfIn PDF document text
    • http://mepowixodudod.22web.org/nutikid.pdfIn PDF document text
    • https://cdn.sqhk.co/jesarijufe/ipgdChc/dedicated_clean_ballast_tanks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480383/normal_601c8a785db84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426686/normal_603d32dfeddfa.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/ghoihhi/dreamed_a_dream_ayumi.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/Ahgi1ig/king_of_thieves_wiki_traps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://podemerobetalax.epizy.com/69345415468.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/xbox_one_controller_battery_pack_not_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dd7d88f-1251-4fc4-8686-c72c5197b65b/estudio_de_los_atributos_de_dios_paul_washer.pdfIn PDF document text
    • http://supikovibamukip.epizy.com/aikido_filosofia_y_practica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc61e0c-8110-4eca-9aea-7fc909782889/arris_tm822_lights_meaning.pdfIn PDF document text
    • http://giverez.epizy.com/dalat_vietnam_travel_guide.pdfIn PDF document text
    • https://e26dc784-fa46-4601-9f6d-57686faaf216.filesusr.com/ugd/c66525_4b885be6aa9343ef9c3526defebe116e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/first_grade_workbooks_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e145da15-3a08-48f1-9291-77193503806d/46322890805.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/how_to_setup_vizio_sound_bar_bluetooth.pdfIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_c6789da488114ae3bee16ee3e89a0b72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/annual_leave_request_form_nhs.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/72957583082.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_off0000f139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF139 5920 bytes
SHA-256: 23c79596477372571da1cbf70d128da372f2f6e613f51372e575a3faec6fda25
font_01_sfnt_off0001053f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053F 11364 bytes
SHA-256: d10b80d20e39b471ad4373c424e68d48c419834a43b5a3fbb056c92954f260c9

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