Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a46184fe547edfd…

MALICIOUS

PDF

86.2 KB Created: 2021-05-14 18:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7c12fa2ca63372e608b2c6125c6ab3d8 SHA-1: 16f6a27205c4f42ea41f1c7664e01d68acd3777d SHA-256: 1a46184fe547edfd8601c17b9917f20392968ecb4bbb5bfcfdc105fcbe09966f
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 0.9990

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://golowaki.ru/strik?utm_term=after+we+fell+book+plot PDF link annotation
    • http://getfreecreditreport.info/wumomigejiku4rxep.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/64244323513.pdfIn PDF document text
    • http://static-start.top/90330610501qv2tl.pdfIn PDF document text
    • http://pulemovidake.22web.org/fudaribupasikifuru.pdfIn PDF document text
    • http://dipugipedanam.sportsontheweb.net/blast_furnace_process_control.pdfIn PDF document text
    • http://topsalon.xyz/wimovofikufuniruxitusos9ynb1.pdfIn PDF document text
    • http://sewonmedix.ru/31230941873rtblg.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/what_is_48_cm_in_mm.pdfIn PDF document text
    • http://wwwbcpzonasegura-viabcp.com/difference_between_web_service_vs_wcf_vs_web_api2g961.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/83569029059.pdfIn PDF document text
    • http://midakurapujif.mypressonline.com/43815875328.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/60142113379.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jopubijako.atwebpages.com/2014_subaru_forester_owners_forum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d67894b-9196-4826-b67f-9277e7ed880a/toshiba_satellite_l755_drivers_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5531eed-8c61-4b9f-800f-38a885a0cb7f/sijuwaxanajopeba.pdfIn PDF document text
    • http://wumafopid.onlinewebshop.net/arapa_trke_szlk_full.pdfIn PDF document text
    • http://jukopiwiguf.rf.gd/sinclair_lewis_babbitt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19b4755-e1d2-4bbe-82f4-953870669ecb/wokonosoxajida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c26f30f-5e4e-47e4-9453-682ccdeb8139/janet_burroway_writing_fiction_a_guide_to_narrative_craft.pdfIn PDF document text
    • http://bukemexuladorux.epizy.com/nipevired.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9d838c-d14b-45db-b2f0-f8c9417847da/sozut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91a5fbb-576d-4ab4-9b2e-d0132e5fe685/37143755244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb02d293-4fa9-495b-8f5f-13231fe8e2db/what_is_the_6th_harry_potter_movie_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca4d4653-67b2-4a91-8edd-1ae9b8a0ae7b/subaru_ea190v_pressure_washer_specs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3D 4792 bytes
SHA-256: 7f5a61aec6030744225d1bb6e0865ade1d40fce8b1a0a28b0ba208a981d3cb9b
font_01_sfnt_off00010fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAD 11424 bytes
SHA-256: 0cad85e628a1e814545dd9294877c21c3e65abc7f83c382d15d288bae61165d9
font_02_sfnt_off0001361e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361E 16192 bytes
SHA-256: b80dcff4b26782ff2bd1ed82e01ce9053ba91b1a5afb9bea673378648d26bec5