Malicious PDF — malware analysis report

Static analysis result for SHA-256 49255e26ea94439f…

MALICIOUS

PDF

74.8 KB Created: 2020-11-11 08:49:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2408e3f08b8315e57f199877b9746c74 SHA-1: d32e8d2eba6dc545f005ce5379c6babaf05bff74 SHA-256: 49255e26ea94439f616565e5924df3b22debdf9dc386346d950d3d4bb7da7d54
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?keyword=storytown+common+core+resources+grade+3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5fa52ce070169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_5f8febd293d38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f94de4e42149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_5f8aa2215bbe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393772/normal_5fa33dc299a4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412161/normal_5faac4ee78edd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407100/normal_5f93aeb010279.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f971a055d575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420934/normal_5fa7661162a8a.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/cbb33770-8d3a-49ee-aa6b-dc24555e2756/najonajunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36eb99fa-3f75-4499-97d0-f231ba0c6024/28642396171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e098cb99-b372-4bb6-ae12-315c75959221/kepagitejow.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/rukaxixolipakopodilesoton.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73cd4ac5-ad55-4f78-b068-587607c18041/jewozoredasataforiwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21701ede-182d-420c-8137-8f2661645046/ramum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9946273-c642-4309-81d0-1f4593188384/popizilulibebap.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_off0000e5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E0 5688 bytes
SHA-256: 478522ec7888e40d0a3b16e8b593de6f3adfbb8aa6dc36c31075f12867f20868
font_01_sfnt_off0000f93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93F 10768 bytes
SHA-256: 437673e7187b85b184b0b067fc5d3a7d52f5886177b68216da9d8c6ac51c5293

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