Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a1584cf67ae0de…

MALICIOUS

PDF

78.3 KB Created: 2021-02-20 22:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 666fbdd35f77b10734ed71088e4e137a SHA-1: 5b5e1dfc5f4e46d3be4aaa35319f1b6b0e0e9e08 SHA-256: 18a1584cf67ae0dea5636b5989796ff63f3780922c7b25fd9168b9cc73267cd5
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 0.9998

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://maypoin.ru/wix?keyword=mario+combat+games+unblocked PDF link annotation
    • http://greatholl.com/lana_del_rey_born_to_die_torrent8t7eq.pdfIn PDF document text
    • http://shoop-ff.ru/8931293034814x6a.pdfIn PDF document text
    • http://it50life.pro/72681842812c54o3.pdfIn PDF document text
    • http://in-step.shop/jumasusoweguvujepumnohvp.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/fr3ieji/lusadonekomonemoriji.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/djdrigp/online_marketing_business.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/Hfjehjt/appdynamics_api_client.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/Rciftzn/61295283802.pdfIn PDF document text
    • http://alkim.xyz/fejopugeduganoliyzx16.pdfIn PDF document text
    • http://spainwow.pro/x_core_sprinkler_system_installationy7fs4.pdfIn PDF document text
    • https://cdn.sqhk.co/wapevenupu/ijbjdxv/bluey_and_bingo_party_supplies.pdfIn PDF document text
    • http://flipping-car.online/31615786698148kn.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/84624231335rdnue.pdfIn PDF document text
    • http://funseeds.site/modern_combat_4_zero_hour_mod_apk_revdlk8lfn.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://s3.amazonaws.com/luramamelolem/beast_boy_shub_zombie_shooter_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/lojalesesepo.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/ielts_reading_file.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_off0000e755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE755 5348 bytes
SHA-256: f8b32bc8c5c0131e8c84dc7a2f0101186402f812aaa37b1f33f91e1ef1daac3b
font_01_sfnt_off0000f968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 10780 bytes
SHA-256: 02028292bdcb5bf8155e6fba324739153a0a59492d3fd6fec66bc94dbb05a7c7
font_02_sfnt_off00011e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.