Malicious PDF — malware analysis report

Static analysis result for SHA-256 219a4667f686291b…

MALICIOUS

PDF

79.5 KB Created: 2021-06-01 06:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b3783efd98596312d36eec3ffd9768c1 SHA-1: 5099df0fdb86518bb31c2b4a5739adcd66f41fbd SHA-256: 219a4667f686291b3cbd1ba4fb1bcccae59f9334f5f60dd5b95c45be2fa607fe
156 Risk Score

Malware Insights

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

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/123?utm_term=command+and+conquer+renegade++full+version PDF link annotation
    • https://dajurejew.weebly.com/uploads/1/3/4/7/134753869/jajuzo-wusaz-tuvumu.pdfIn PDF document text
    • https://palokeligiz.weebly.com/uploads/1/3/4/4/134496709/2419881.pdfIn PDF document text
    • https://narobukedezupe.weebly.com/uploads/1/3/0/7/130738621/d26bb01d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_6029b2dd5d25b.pdfIn PDF document text
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/lupefa_rulamogewapubel_nukata_mopujo.pdfIn PDF document text
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/1758943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_6050e33befbff.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://uploads.strikinglycdn.com/files/9bd6e8fc-6a0d-437f-8f83-2416ff485909/sivaji_the_boss_full_movie_tamil_hd_1080p_download_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f92ac81-6d5c-4c83-b501-4833265e2fdd/votaworovuporuzajidet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22f3a35-6ec7-4018-bff3-b029aa69a1a1/wasesidaboguralalesataded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15aae682-4057-4b09-9100-bd3ebf30f4d6/what_are_the_principles_of_environmental_ethics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4394db90-1a38-4064-a465-ca2fcd892b83/how_to_program_directv_remote_to_an_element_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9d63ec-2329-42f8-ba6e-df5fd500d2ff/descargar_el_talmud_hebreo_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543353bd-4046-4be5-b445-ae2f5b8577d0/how_to_use_mini_keyboard_with_android_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fffdee1d-d5dc-42b5-bf94-375b3d78eab1/resumo_livro_inocencia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbb086a-ed49-411c-a1cc-927cffe7aea0/sandisk_sansa_clip_2_gb_mp3_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ce83af4-e2f7-4637-bccd-4ccfe1244053/how_to_set_up_xfi_gateway.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb8ec8a-30fb-44f7-a406-e1627540ce24/how_to_control_emerson_tv_without_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2606661-8d75-4da6-9443-3a940dab5f51/how_should_i_study_for_usmle_step_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e700f7b-ea91-409c-8ba1-50a9fc737f8b/redundancy_in_grammar.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_off0000e6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FC 5352 bytes
SHA-256: cfd42f268b0a308d2478eb9df78c8787b3a632fc5183c30e4cd65bde159d8c5e
font_01_sfnt_off0000f90d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90D 12584 bytes
SHA-256: bd4f3c4cbf5b63ae6e12c1175ba23dff254ae7f1ed75ed8a89ab050428891360
font_02_sfnt_off00012203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12203 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230