Malicious PDF — malware analysis report

Static analysis result for SHA-256 723f02dabf2b60e1…

MALICIOUS

PDF

105.4 KB Created: 2021-03-09 15:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 28862d2a9430313d29d52e568be9f3c9 SHA-1: 1dd9d80efb278859f42e21ab2c82a775241030af SHA-256: 723f02dabf2b60e160bce247c4e56b0bee09460d92074640d20378e77c2a78e2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The file contains numerous embedded URLs pointing to potentially malicious domains, suggesting it is designed to redirect users to phishing sites or download further malware. The presence of external URIs and link farm characteristics further supports a malicious intent.

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://druttle.ru/wix?keyword=mighty+med+cast+horace PDF link annotation
    • https://cdn.sqhk.co/pufowuvikij/M57wgil/xtreme_bike_price_2019.pdfIn PDF document text
    • http://samo-katim.ru/how_to_read_a_birds_body_language2162d.pdfIn PDF document text
    • https://cdn.sqhk.co/jisogixij/UFgeghV/google_maps_alternative_route_anzeigen_android.pdfIn PDF document text
    • http://istlan.space/chandrayaan_2_in_marathi_information740lq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423427/normal_600654aae571b.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/tilepibabemazis2hm6q.pdfIn PDF document text
    • http://cloudmarket.website/tifowutudimenifaxomugunlxrx9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450636/normal_601293a6a2608.pdfIn PDF document text
    • http://just-gopro.com/stihl_025_chainsaw_carburetorv36g7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_60181ff38ca22.pdfIn PDF document text
    • http://cartest.pro/gartner_siemqed1q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_60216ba60c210.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/icihdhk/nifurimujodaxarubomon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea21707-3807-4151-9155-fb0ae6aae8c1/el_coronado_at_doves_rest_cabins.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_6df040150dc446faa8a8d0f6fa06cd9b.pdf?index=trueIn PDF document text
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_4085144fb11746af9747887677fe8747.pdf?index=trueIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_7a01fd3172ce4c6581fb1028b15a7545.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/013718eb-1cde-44b4-a9dd-2bb483192fae/26043268812.pdfIn PDF document text
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_7071ffb5afb24923aa6d69bc7456a5d0.pdf?index=trueIn PDF document text
    • https://cbb9655c-b60d-4095-8c1c-bb5f9a2903c5.filesusr.com/ugd/4dd980_815d50ef130a44a7ae84986a6a90a790.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a30a79f0-0386-488b-9395-3a9d8de1fb46/how_to_hard_reset_kindle_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51345fb1-bd5f-4606-b533-c29b057af80c/giluwom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09fc4ebf-62a8-48cd-aa7e-043f57660a32/60083229986.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_off000162ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162AC 5428 bytes
SHA-256: 494b69836b8fad7841c10286acec480cb877a192a158709ae66932489ca71bf8
font_01_sfnt_off0001750c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1750C 10208 bytes
SHA-256: c021027df4bf7a9a10808bc21c837ea5ae60d058b43b37fd20ea5273311717f4