Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef84b7b8db011e2…

MALICIOUS

PDF

126.5 KB Created: 2020-12-14 18:33:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 95dea7f343a43e3ba84c71eac3c34330 SHA-1: 9d3995054a1db642104d3d74d4ace0f425756a57 SHA-256: 7ef84b7b8db011e253fa215503ae611792322220e537737a0a1d554cdb229b65
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://gettraff.ru/strik?utm_term=philosophy+of+action+books In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5fb3060e12e6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fcd348368a2c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc29dd524b06a7eb30a4ada/t/5fcf8f7f14319a51dc366507/1607438207383/61083895705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/979b3dce-b045-4215-978a-356d12baf8f6/practical_magic_for_beginners.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce04f10356d927d7eb6228/t/5fce9f2c6df3f351a6668015/1607376685024/prank_call_spoof_caller_id.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/sejatimix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66c5011f6a41984ab7b42/t/5fc7659f48d5672cfb3ea096/1606903199678/fakijazimuvobuledunarunog.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/nemadimop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4b7c12-27c9-41fc-b105-a9872d547c34/bajobovumeduwavenokaxexuw.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/48572080128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9dfeb39-5138-4d44-87b1-b579922be1d6/caduceus_medical_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c559b26-0aec-4dd6-a1ec-d7e33e83e246/capital_goods_company_examples.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc155cc8139af037648468f/t/5fd15fcd8185f4776aff2712/1607557070316/spiral_galaxy_pics.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_off0001b56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B56D 5316 bytes
SHA-256: 326b4195334251a04ee2be9cfe6b3403b19ccd55bd75eb672fdc6fa0535526d2
font_01_sfnt_off0001c78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C78C 11108 bytes
SHA-256: 40e800a1288292a54e7bafa27c59c82870b11665cf12daaf0530601a1571e88a

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