Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f22dbb769dc3a3c…

MALICIOUS

PDF

70.5 KB Created: 2021-02-04 12:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8abbaef9cf6c8810e5d9cdc51998f370 SHA-1: f8600d816af9ae2f0466eba6cc73c024cee27f1f SHA-256: 1f22dbb769dc3a3cbaeb3483fc5d84148b1f5844bc2a962e4c9201424ab191f9
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 URI pointing to 'https://maypoin.ru/aws?utm_term=new+arkestra+song', which is likely the primary lure. Although no scripts were explicitly extracted, the PDF structure and the ML detection suggest it's designed to exploit vulnerabilities or trick users into visiting the malicious URL.

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://maypoin.ru/aws?utm_term=new+arkestra+song PDF link annotation
    • http://1xbets-reg.site/robinhood_alto_rangehood_manualkxde7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5fdb2742c1e15.pdfIn PDF document text
    • http://jodazok.22web.org/free_christmas_carol_sheet_music_for_piano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_601b4b3153425.pdfIn PDF document text
    • http://rejuxipo.iblogger.org/34284927276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473919/normal_60152fb438ea3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459654/normal_5fca030e217b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391302/normal_5fc733ad923e6.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/sedimeraxufi/vagosajazakofafugumikavo.pdfIn PDF document text
    • http://dewelimu.epizy.com/xirasokadorori.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/80126000710.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/zowifewokiredusuwutum.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/tivagulafosusenijug.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/scratch_2_for_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/manawatu_college_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/59143572947.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_off0000d89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89B 4948 bytes
SHA-256: 0c9ab1c7255ad504b4ab6e3d728a442f93d89f81ed38f6457e518dbf12da3c3d
font_01_sfnt_off0000e999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE999 10396 bytes
SHA-256: 331f5a9207ece4234054b99fae65d8e868d85d5df7022b90897a76b00c3fd5f4

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