Malicious PDF — malware analysis report

Static analysis result for SHA-256 8944d1e8b5a5f68e…

MALICIOUS

PDF

71.1 KB Created: 2021-02-18 09:57:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1e23e317c3b85864113b2d5f7d1d1ade SHA-1: b5c801f234bd1cd2cc97834e062cc34cfad8ca28 SHA-256: 8944d1e8b5a5f68e183d048c8ed5d3b44465d5f0ccbeff4c5573642cbd73b97d
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious URL, and the document body, though heavily obfuscated, suggests a download lure. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wix?keyword=usb+extreme+ps2+slim+free+download PDF link annotation
    • http://filopibat.22web.org/bogajanetudojut.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/j1hazhf/32044987849.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445116/normal_5ff139c8dcdbd.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/FYZidhh/superhero_fun_run_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/ragonujip/b6vFTjb/car_eats_car_multiplayer_racing.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_5fd9cc5e3b779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465249/normal_60117708b4418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_60298cf29db85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5fc5e9947de05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445334/normal_5ff94d93e2621.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5fdeac37135f1.pdfIn PDF document text
    • http://ligovezedeje.iblogger.org/67945055690.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/fowikorejodi/infantile_spasms_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/fizevotufelenisuvi.pdfIn PDF document text
    • http://tumofif.rf.gd/scientific_poster_template_a0_landscape.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/4991275767.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/apa_reference_page_format_template.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_off0000d734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD734 5612 bytes
SHA-256: cff01d82851b2c5a2525486a6f2e635fc777dd13303211109682ed65ae955102
font_01_sfnt_off0000ea44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA44 11044 bytes
SHA-256: f016c90d6622d423bc09e571d1cf38836d09cf7b56130cd409d7c655701c4d70

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