Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f9a3b23480f854…

MALICIOUS

PDF

93.5 KB Created: 2021-05-31 07:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e15ca9a944022df0a04b27b6f2dacf01 SHA-1: e3e7284a41690eaa2a00540ba35b4081c216fd34 SHA-256: f8f9a3b23480f8544584ebdb906f1491a541395fa3986ce0997196701ab5f536
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://midufefew.ru/123?utm_term=format+sql+code+shortcut PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413002/normal_6055678ca0074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_605b3a859698e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417413/normal_5fc576cc6a1c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447885/normal_606e3baf4288b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6594d7aa-075f-47ad-a6a8-201f869e1844/big_little_lies_season_2_review_av_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543afdd0-b4f1-48be-93bf-71057b59afae/2017_military_disability_pay_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2049a19-f9e7-4015-b2b0-aa0e8a552de5/tomipufupawupunilive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3dafeab-5f03-4072-ae4d-cf45a0b2e9ec/paniketovisigejigagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132cc4b6-2cb9-4223-a8f8-0aa3a7b6cd4a/lazarillo_de_tormes_resumen_corto_por_tratados.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bca482f-5fe0-4be7-97aa-00beb4db16e0/53974500345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0d4270-f61f-4ed7-acf4-7ff9328b6f01/fuxod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a9c41e-fdb5-4378-b2a0-97c72b8a6329/how_to_reset_rain_bird_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/482a21e9-98aa-4154-bcae-3787728b3346/how_can_i_learn_korean_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47f81f4-d997-406e-878c-eb6d4d29f0e8/nusen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2fe22bf-74a6-4c85-97f2-9907d4cfad97/designing_great_beers_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee06d0c4-1dea-4c22-bb69-7f400ebda9a8/what_is_probability_and_statistics_in_mathematics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffaba4da-df79-4c49-aaf9-6597f9d6548e/12852691533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8255f03d-53ca-460a-b916-0ed08ffef910/site_reliability_engineer_education_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94ad47b1-476b-4164-ae54-9bbabdaae2d8/revonupeluvula.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E3 5260 bytes
SHA-256: 6d36f3596aa5b7b14eec4cd256b728eb0261fdf07916b08674a8ca5c7f963331
font_01_sfnt_off00012a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8F 11980 bytes
SHA-256: 5443f581b23b2b66ade5321a8bac31175d7dc923a49b66a625cd27d73881f77b
font_02_sfnt_off0001538f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538F 16576 bytes
SHA-256: 340caa610ae5a3878353237f27237c93c3ed9d1823b0f6e48bf34d1446c20cd0

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