Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5c9ac4a0ebc894…

MALICIOUS

PDF

68.3 KB Created: 2021-02-22 20:37:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c8e5ab3cc4e41964233a2176d1a9d169 SHA-1: 6a6e242c8d904a6bf5958e4a0a2c90258fcde16e SHA-256: 2e5c9ac4a0ebc89481d6e218c0b42b7cd11bbd133b7c301b161e282c490e02e2
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver malware. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL points to 'yafferge.ru', which is flagged as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=finding+halfway+between+two+numbers+worksheet In PDF document text
    • https://cdn.sqhk.co/winudesuw/jbjgiie/moneylion_mobile_banking_apk.pdfIn PDF document text
    • http://itanah.space/english_tenses_for_dummieszmdos.pdfIn PDF document text
    • http://stepka2016.xyz/soal_osn_biologi_sma_2018a77lo.pdfIn PDF document text
    • http://hh666o.site/70711703742tqaf4.pdfIn PDF document text
    • https://cdn.sqhk.co/zatuwifezub/Wifl2n0/63153446275.pdfIn PDF document text
    • http://xtina.online/bugaxozcwre7.pdfIn PDF document text
    • http://usblighter24.site/word_search_quest_puzzles_to_printizzcz.pdfIn PDF document text
    • http://freshmind.net/the_signal_and_the_noise_downloadznsm3.pdfIn PDF document text
    • https://cdn.sqhk.co/dodazija/7Ejiwib/cover_orange_journey_gangsters_walkthrough.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jegozejixal.epizy.com/xuwenuderikobofoko.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/consumer_reports_cantilever_umbrella.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/96843182767.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/the_personal_mba_review_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/3d_demo_video_for_samsung_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/buildings_types.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/free_tv_guide_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/96619940395.pdfIn PDF document text
    • http://bawavejukedosuv.epizy.com/applied_photographic_optics.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/harry_potter_and_the_half_blood_prince_original_book_cover.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDCC 5672 bytes
SHA-256: 83a265e88bd61dba916faae707acaf855695d705636b4c59872fa365a92bfa5e
font_01_sfnt_off0000e109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE109 10284 bytes
SHA-256: c08a3179628413b53e11db91259ae768158fad54df7128499fadf825044fae4e

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