Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e8412e43fdbbe8…

MALICIOUS

PDF

73.6 KB Created: 2021-03-01 16:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a8475d1af0478569d4fa66eb06ac2f30 SHA-1: 877263dd85397ea34b64456db23349a6ea8710b5 SHA-256: b8e8412e43fdbbe83a35b3c9e80178c9bad1f7552b8ab3110b5d98a69f469d83
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to building a climbing gym, which directs the user to a suspicious URL. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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
  • 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://baarspo.ru/123?utm_term=how+much+does+it+cost+to+build+a+climbing+gym PDF link annotation
    • http://nout-sale.site/sports_worksheets_anglomaniacyzaqeu.pdfIn PDF document text
    • http://jofadebujidut.22web.org/proform_995i_dimensions.pdfIn PDF document text
    • http://fallofelin.online/48563360645pt6ir.pdfIn PDF document text
    • http://lorowivo.22web.org/56939662224.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381104/normal_5ffd017cc8efb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5ff949cc447ec.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/zarelusipofox/bulma_templates_github.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/pulmonary_embolism_guidelines_2016_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/55660783319.pdfIn PDF document text
    • http://pujixedigegogup.epizy.com/agents_of_socialization_family.pdfIn PDF document text
    • http://joxumokuri.epizy.com/chittagong_full_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/llp_balance_sheet_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/fmovies_to_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/music_notes_symbols_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/54434750776.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/mental_arithmetic_book_1_answers_online_free.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_off0000e16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16C 5552 bytes
SHA-256: 7f348fd954575b89f145c66366cf979c3a13f0b06872b6766ca1f6f39a57ea23
font_01_sfnt_off0000f43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43A 10776 bytes
SHA-256: bc265bb16af53356725e41c80beda3808c5dec119ddb5d8f9ed7a70cf0acf5fe

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