Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a3808d2bc550e1…

MALICIOUS

PDF

80.5 KB Created: 2021-05-03 22:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 47d5a8219da959955ce35f906b08e354 SHA-1: 5ab333a83cec077139987cc48af40e2031300160 SHA-256: 01a3808d2bc550e168fe2fd9485c7bf6fdd2bb894c31ea3127a06621ce6af086
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9997

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://vilenefex.ru/strik?utm_term=que+libros+de+la+biblia+fueron+escritos+en+arameo PDF link annotation
    • https://cdn.sqhk.co/bemaxopig/eA6zCZH/vefelexaxutivewidawofovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_60187a84d32e4.pdfIn PDF document text
    • http://wazixusazajafem.22web.org/77894443156.pdfIn PDF document text
    • https://cdn.sqhk.co/xasurila/ifXjijh/wizuwureleragimutigofegog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_602d7cb12efe8.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/fhdw7hf/psp_games_emulator_iso_database.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/Bihgd1I/78527084747.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491412/normal_606e70f29d420.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/djiggqN/post_it_notes_for_desktop.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/fbd11ff2-f8aa-45ce-860e-ecc391c90f16/the_prayer_of_jabez_lyrics_geoff_moore.pdfIn PDF document text
    • https://24b051fc-04af-4e2d-8b9e-4e75c06063ec.filesusr.com/ugd/1a488c_9bd8eda6094a45408fbdcbbb08dfb2e4.pdf?index=trueIn PDF document text
    • http://jilemizofi.epizy.com/cierre_de_barrera_hematoencefalica.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/berifuvowujesuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5b4858-7406-4ff6-96a1-b864cbb4f820/ripotefetekovow.pdfIn PDF document text
    • https://29bb9f0a-cb36-4278-8b1c-05d86a2267e4.filesusr.com/ugd/25e746_585be82d3c4743cdbe12c77973933369.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kafises/araku_valley_photos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d747708e-3833-405e-9a7e-2a0cece23381/remstar_pro_m_series_humidifier_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecf5dd23-e4aa-41a1-8d8e-45c9be3c77db/voodoo_lab_pedal_power_2_plus_used.pdfIn PDF document text
    • http://nonivomiba.rf.gd/xojimivurowulefejol.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/yeastar_s100_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/daring_rakhwala_film_song.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_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 5368 bytes
SHA-256: b7c889ee51e3a75e8150da325ef3eb1d93c07f9d0ab235539372374ac227ac6c
font_01_sfnt_off00010d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D29 11644 bytes
SHA-256: 690452aef5d35b8a474bfe566544f560cbd8b6614e74b2bc9721cd70376b2157

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