Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e9398ee7481710…

MALICIOUS

PDF

76.3 KB Created: 2021-03-26 09:47:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 653c26d1cc161d3cbf4ebfacad142ac9 SHA-1: 7848d824fe079cfcdab64d333631090cd828e24d SHA-256: 05e9398ee7481710c5c6b35e7f91187cb3f7f74cdbb068f809b6901d1179291f
186 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 0.9990

Heuristics 6

  • 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 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.
  • 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://zajinet.ru/wix?keyword=best+ferret+food+on+the+market PDF link annotation
    • http://vipobora.iblogger.org/crystal_growth_bridgman_technique.pdfIn PDF document text
    • https://cdn.sqhk.co/gixirunizem/RggidGc/49627534250.pdfIn PDF document text
    • https://sesifubonimexa.weebly.com/uploads/1/3/5/3/135317238/1367262.pdfIn PDF document text
    • https://karomigotel.weebly.com/uploads/1/3/5/9/135962203/5b7de8de92c31.pdfIn PDF document text
    • https://cdn.sqhk.co/tufiroxova/janSwhd/vodafone_yan_mda_bana_ne_var_internet_hilesi.pdfIn PDF document text
    • https://wonikisemuk.weebly.com/uploads/1/3/4/9/134902350/guxefe.pdfIn PDF document text
    • http://xofajenakimexo.iblogger.org/53720946097.pdfIn PDF document text
    • https://cdn.sqhk.co/fagevibe/ghDhjhb/integers_worksheet_grade_6_icse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuluputig.epizy.com/alcon_rebate_2019.pdfIn PDF document text
    • https://aaca6425-83b8-4992-a49d-2ec8a2d61848.filesusr.com/ugd/304e3c_b94e5c9541da40d5a442ef217b1509be.pdf?index=trueIn PDF document text
    • https://d2d110b1-dce0-4b0c-bed7-be24280b7a6e.filesusr.com/ugd/165585_6b8908d07ad94961af41fa4fc3177ca8.pdf?index=trueIn PDF document text
    • https://8aefc570-8454-48c3-bb63-d4d1067b7ce0.filesusr.com/ugd/5c9621_db1946501161478295db27c0ba91ddc1.pdf?index=trueIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_581bcc9e61254669bdf961c5c03ff458.pdf?index=trueIn PDF document text
    • http://pivasif.rf.gd/67745247030.pdfIn PDF document text
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_431592b429fe4e99bfdf0a4571c405aa.pdf?index=trueIn PDF document text
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_747bb68570fd4b88aadbece7c1316aa3.pdf?index=trueIn PDF document text
    • https://db38eef3-7d65-43a4-badd-ba39ed7d9417.filesusr.com/ugd/bd2483_bbb93c1066fc4d68aaa36cedc8480c45.pdf?index=trueIn PDF document text
    • https://d7179dab-c972-4501-9f4a-16044ca71e84.filesusr.com/ugd/434f74_ef3eec852f5d4888820e0bf851994a22.pdf?index=trueIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_5abdf72076f54ccf9598310926903db9.pdf?index=trueIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_e9399626faf9419bad8c191804502cbb.pdf?index=trueIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_e09d6ff6be4c4d889caee08f831dc077.pdf?index=trueIn PDF document text
    • https://6997f972-013f-4c6f-ac95-4179ba17a557.filesusr.com/ugd/549e1a_52efe7d503af421ba52a27560185ad78.pdf?index=trueIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_013332edcda146e7b9fa36592313f060.pdf?index=trueIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_739fe19b12f14fe1909bd9b4f2441d84.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_97cb1c8833db4ca6b874c8850bacc6b5.pdf?index=trueIn 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_off0000ea73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA73 5228 bytes
SHA-256: 76cc5dc86e98115f57b237e0f7a69d631ad345080db16c1e5fb3869324d8264e
font_01_sfnt_off0000fc12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC12 11352 bytes
SHA-256: 95f12959fc539f31292ece545ebfcba07bb0bd09cd24778b66bc6da25df22857