Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20c299fb1343f4a…

MALICIOUS

PDF

102.7 KB Created: 2021-04-22 19:35:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ae4f6c2ee3d3052eac70ade3af962bdc SHA-1: 1a9f92d29ae27931e79430a04eb8be72e7012528 SHA-256: e20c299fb1343f4ad2931d78f9d159e67827c096bbb8e6fe4713db1727e6b2f8
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 0.9998

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://pelibifir.ru/strik?utm_term=what+is+the+most+powerful+navy+in+the+world PDF link annotation
    • http://feyakast.online/philips_multigroom_3000_vs_7000bymef.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/89394002542wmpwk.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/tarot_card_combinations_reader_in_jaipurlxoxz.pdfIn PDF document text
    • http://jigavot.iblogger.org/the_prayer_celine_dion_andrea_bocelli.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://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_d8af0776be3a44c0ae2d73dd958493ad.pdf?index=trueIn PDF document text
    • http://gadoxijumulop.epizy.com/free_pirates_1_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/goluderufada.pdfIn PDF document text
    • https://9fb0fece-6c2a-4f8b-8ff1-5d9ea67f5ee7.filesusr.com/ugd/f6a907_7b91ee95493d42859e430770bea551aa.pdf?index=trueIn PDF document text
    • http://wirodugapilab.epizy.com/zivuxenuraxosexoziw.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/xumawe.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/power_electronics_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/27522171440.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/75374048363.pdfIn PDF document text
    • https://b2fc43c4-60ab-4dc1-a1c8-84833fda4e2a.filesusr.com/ugd/37321e_446a4aaaae8e45e4bb25469f90369493.pdf?index=trueIn PDF document text
    • http://wezinetukuxemim.rf.gd/adventist_home_health_waldorf_md.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/bipikotebudoluni.pdfIn PDF document text
    • http://sejigesenevemi.epizy.com/community_jobs_worksheets_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/xelij.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_off000143ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143FF 5428 bytes
SHA-256: 0e8f8c5af04914e1daac001cb92f204e65f8939484aaf38d61155bca67a91a1d
font_01_sfnt_off00015669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15669 12008 bytes
SHA-256: d187a169e474c13e0f86c2e392ba68111c73c83caec077b5b545737ea7cb73c6
font_02_sfnt_off00017f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F21 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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