Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5a247f491a1bb3…

MALICIOUS

PDF

68.8 KB Created: 2020-12-13 15:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e6754911cae0bb4c8b6ab6c9574973d3 SHA-1: a38fa2da7fc1fca93227bae1bc7558fef04dc362 SHA-256: 4b5a247f491a1bb3bcdd84eb0773de3fe8068f830204939faaca2b7a5aabd953
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 0.9998

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://trafffe.ru/strik?utm_term=divisibility+rules+worksheet+pdf+with+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423189/normal_5f9d701b9923d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473432/normal_5fab75d7ae534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380858/normal_5f99e85595c09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470231/normal_5fb498cdda39f.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/dabatisew/hide_action_bar_android_manifest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00c71dd-19b8-4c57-a4ed-8b234b4956bf/kafilakufabika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/643a78d6-66ae-4899-bad1-8cea2087afca/bombo_murguero_de_26_pouces__centim.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4ee8c24b06a7eb3194721/t/5fc6ddf456cd4459b3a7a257/1606868469465/85634491273.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/acid_base_balance_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/610dee7d-7487-43dc-a066-988ade738221/55008087308.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd02ce3ca23154c95c40ca/1606222542816/mini_backpacks_for_toddlers_with_leash.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505e55c3-62bc-4211-a897-b7c27e6b40a6/pokemon_shield_legendary_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5498fa04221c71173fe4/1606374558110/osrs_piscarilius_favor_guide.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_off0000ce60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE60 5584 bytes
SHA-256: c8c4896d74598b5630726a12e8a82fca76c4c73678e9c31839e546cc1295a967
font_01_sfnt_off0000e176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE176 10772 bytes
SHA-256: 2e0d1ac9e33d8184269cd69d3fdb83086e0a30c717c38443e539b5bc52bc27ed

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