Malicious PDF — malware analysis report

Static analysis result for SHA-256 762255a463927422…

MALICIOUS

PDF

75.7 KB Created: 2021-03-10 20:38:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ca3f6c97040a06e96707c43053284ce1 SHA-1: 28168bca8a2c4ef5b3ac632a6b41d20e87e57f94 SHA-256: 762255a4639274223fa9b2748ff34a753411471d133a912c29b14228ad394c4c
126 Risk Score

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 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=food+trailer+lease+agreement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391331/normal_600f91ac81a3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408184/normal_5ff6b25fb0149.pdfIn PDF document text
    • http://iuts.space/how_to_root_samsung_galaxy_tab_4_sm-t231_using_odin8zl7g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_60395dfa36e84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470975/normal_5fcd028f80e25.pdfIn PDF document text
    • http://trokot-online.xyz/yuva_upanishad_computer_book_downloadxiius.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496812/normal_60170fe7a7253.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392857/normal_5ff068960feac.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/85082711258.pdfIn PDF document text
    • http://bestrongbyg.com/kunefoxadopaxopixujusaxcwnm.pdfIn PDF document text
    • http://pagebake.com/bodyguard_song_teri_merict1ta.pdfIn PDF document text
    • http://laulu-go.ru/920178512312piwx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_0a30f7430ba54a2189d81e29926708ae.pdf?index=trueIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_c67242e4b7cd4022962716f87ffc3290.pdf?index=trueIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/wuzivajukut.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/spotify_apple_store.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_5543a0782c964475901e59daa2006bbc.pdf?index=trueIn PDF document text
    • http://sabixukavizom.myartsonline.com/how_to_get_surface_area_of_a_trapezoidal_prism.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/bluebeard_perrault.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_14f032fa3c5d47e89318fb8a1f0b3fdb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/25784933267.pdfIn PDF document text
    • https://26bfc7ce-baa4-43a1-9280-72312523cbd3.filesusr.com/ugd/5af86b_42f1ef8a7d2547fb8d4ec02154e444f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/logo_language_for_windows_10.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6E 4888 bytes
SHA-256: c0c3cafa83b641d8f4b838f4e0bb60d6873ca6bc728628f9d63f491ab3ecaae8
font_01_sfnt_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 10228 bytes
SHA-256: 866a667cd54ef5a1f50d11f0bef3c0995b7435f735c753855498059b432a77a5
font_02_sfnt_off000112f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f