Malicious PDF — malware analysis report

Static analysis result for SHA-256 248334380cd8d15d…

MALICIOUS

PDF

75.2 KB Created: 2021-05-24 19:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a11f5a7b2db7444a7362b683510bb384 SHA-1: b3ec8e729c574ea8db061749bb8198c736898fa2 SHA-256: 248334380cd8d15d9aff09a3dd8c256974c7232e31cdec770b587cbd1bb9c490
104 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 presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/strik?utm_term=undertale+full+game+download+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464735/normal_6062bd0cb9581.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410433/normal_5fdf2a370bf9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_60391f66204c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405181/normal_5fda66df4a96e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_6052e1dc59b5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387701/normal_6012e0f3ed8fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_60559da84d7c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_603443f7a680a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_601be1435a9e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454306/normal_601b70862adc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480382/normal_603d4325acdc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_60635dd696205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_606234fe6ef4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_604a26159b194.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409258/normal_6000209238999.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457561/normal_604cfd0f76161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_601c5f6bb68f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_6051634c5af71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447271/normal_5ff8a8a59ac03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447658/normal_6025cf0d04ef6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_6059663be5b1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418781/normal_60358628c29f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407788/normal_603af3a004882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477373/normal_60552bcc90a1a.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/xomepixo/how_to_automatically_pass_your_drivers_test.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/bbc_iplayer_to_sd_card.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/91491711849.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/92627724579.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_off0000e7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EC 5380 bytes
SHA-256: e4ce34e4ef0c76043a8a0527378182f00bb9e4dccbda3763ca32d1e4b2c245db
font_01_sfnt_off0000fa3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3A 10856 bytes
SHA-256: 9f99b17ca79917b5a3db25e484e7331135f5605b9c128502f69de4bea023c10b

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