Malicious PDF — malware analysis report

Static analysis result for SHA-256 27b62d963c5afbd8…

MALICIOUS

PDF

80.6 KB Created: 2021-02-22 18:18:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3b8d0335cc41bdf4de2a29ecb22f2810 SHA-1: 13c2d1609a699c2b437b12422c5f3474f653b983 SHA-256: 27b62d963c5afbd8b2f7a3043f16822f4c91d903f863a04a54d5ea69fd050cc0
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, as indicated by the PDF_URI heuristic and ClamAV detection. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, suggests a lure related to 'selling leave days army', likely a pretext to drive the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://druttle.ru/123?utm_term=how+to+sell+leave+days+army PDF link annotation
    • https://cdn.sqhk.co/bovokolel/SxdiiYv/sobuwovamoxesefotabafawa.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/5hchdih/11914125527.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/pijFggp/nefesasimepegaxux.pdfIn PDF document text
    • https://cdn.sqhk.co/norumuwapa/id7ahbc/tuborewesibalosuta.pdfIn PDF document text
    • http://7lessons.space/themeforest_responsive_html_templates_freerd35v.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/3jhaoKU/93008757361.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/j6yw2XT/vusigiguvijimopamel.pdfIn PDF document text
    • https://cdn.sqhk.co/bapuwanuvadi/jPEiejg/imdb_top_movies_2019_netflix.pdfIn PDF document text
    • http://strahuemsya.info/quadratic_formula_worksheet_with_answer_keye28mu.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/biLjagc/sodarobi.pdfIn PDF document text
    • https://cdn.sqhk.co/pujazojiwixi/fUjhehf/juventus_vs_barca_champions_league_2017.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/9455093669.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/1259849255.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/gutivejategufatabi.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/tifebabodavifilerefalige.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/xupeki.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/73205005750.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/google_play_store_update_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/24425100834.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/75128760106.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_off0000ff38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF38 5184 bytes
SHA-256: f4d9925aa7aed55b175b018f6b92a1de872397d852772947d35b79ed19fe788f
font_01_sfnt_off000110de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DE 10544 bytes
SHA-256: d93b023f27d41f73fbdb04e12b0e99a0c0c2618cf626b3f157efbd4d6c59480f

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