Malicious PDF — malware analysis report

Static analysis result for SHA-256 0261ec124664a16d…

MALICIOUS

PDF

73.7 KB Created: 2021-03-18 15:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bd28142badf9f50fd77ab2bf4cf07255 SHA-1: 5d2ef5f7c9cc181a2227dcbee803575967059d1e SHA-256: 0261ec124664a16d22fd4446ebc42af31d5ca751b1fc522bf806943e6d128ef4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, indicating it functions as a link farm. The primary purpose appears to be directing users to other potentially malicious or SEO-manipulated content, rather than containing a direct exploit within itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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://golowaki.ru/award?keyword=advanced+english+reading+comprehension+test+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421934/normal_5fdf2c5ec5423.pdfIn PDF document text
    • https://xuwumiguxapizif.weebly.com/uploads/1/3/0/7/130739656/livajegisimuj_fulofegesit_demesifusisu_pajikotibinutev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5fe8aeeddf6c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5fccffddbbac6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491175/normal_5ff71aeec82aa.pdfIn PDF document text
    • https://kiteginizi.weebly.com/uploads/1/3/1/8/131871518/pimuxivok-naguwebegese.pdfIn PDF document text
    • http://dakixofib.22web.org/1933822503.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382953/normal_5fe11bc13dc56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_a683a385f27847aa8ad2d395cbc5f6d1.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_45d4793dbacb41eaa62a8ee6c268c8da.pdf?index=trueIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_9242f48d8fcc45a0ae890cfebcacd2a8.pdf?index=trueIn PDF document text
    • http://kiwopej.rf.gd/canon_mx430_not_responding.pdfIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_e9a986971cee4b0cafe6659ce29ffe64.pdf?index=trueIn PDF document text
    • http://lekinip.epizy.com/aprilaire_8465_thermostat_installation_manual.pdfIn PDF document text
    • http://konojutusaxevik.rf.gd/vibik.pdfIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_e2612f2e18d24c1eab0da10ba7deebc5.pdf?index=trueIn PDF document text
    • https://d046670e-94b8-4ea2-8efc-69fca9b502c9.filesusr.com/ugd/c0b427_c10f872a128b4cccb3380a36cffe470a.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_off0000e0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 5620 bytes
SHA-256: 008a614e15dbf5e7b4dc0cf8e504b38ee9d56c262c014eb1d7ebf2ca4036d4e8
font_01_sfnt_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 11188 bytes
SHA-256: 9ef48b0f6942b718122dccffe0bb8755765eb2a59c3f9f8c283cbe51b9132228

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