Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cf5fd6e6d5dc58…

MALICIOUS

PDF

140.2 KB Created: 2021-02-19 01:57:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b2689f56fc932825bca4a0b5e1395b7d SHA-1: 278c74e2365d75c2fe4ff2088dba80d5550d0e5b SHA-256: 83cf5fd6e6d5dc5878a8d46cece480ce47578bc1785a70e8bdc4e97ccb7394fc
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a site related to 'atlantis gym equipment app', suggesting a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=atlantis+gym+equipment+app PDF link annotation
    • http://salearea.pro/acid_rain_solutionskwp81.pdfIn PDF document text
    • http://proita.fun/the_crucible_comprehension_questions_act_1mbhlb.pdfIn PDF document text
    • http://wajabub.22web.org/short_answer_english_hsc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494868/normal_5ff42dd64e77c.pdfIn PDF document text
    • http://help-lnstagramcopyrights-verify.com/fareler_ve_insanlar_olay_rgsfdwa4.pdfIn PDF document text
    • http://boputev.66ghz.com/poxopokafala.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386591/normal_5ff6690444f44.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/xoxaneral/buncefield_investigation_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/vegigazufufubexivi.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/24407637748.pdfIn PDF document text
    • http://fokafupu.rf.gd/what_does_the_national_anthem_represent.pdfIn PDF document text
    • http://vifikuvikepavad.rf.gd/pazoriwevobiraxo.pdfIn PDF document text
    • http://nanedivelewiwi.epizy.com/8328123738.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/lekusoxid.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/gemajiraxotubor.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_off0001e473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E473 5260 bytes
SHA-256: e69cc62a70113e60f6e341255b922cec29a3558d6334c54cc767c4c46b1ed57d
font_01_sfnt_off0001f653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F653 14100 bytes
SHA-256: e736025e4fdac67b9eabc8914ae86e4ef00c778f8cbb67f4b2044960b07aa1fe

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