Malicious PDF — malware analysis report

Static analysis result for SHA-256 33128d0b2a3bf4a7…

MALICIOUS

PDF

76.0 KB Created: 2021-03-31 12:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 27a5b22f5b3210e7d131352fb8927ac7 SHA-1: 1645ff6de79c8785cdf641c3bf86caef28e3f07f SHA-256: 33128d0b2a3bf4a731c27a098ebfa2e2f814981d41fcdd3e26ddd7796680ecca
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 0.9996

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://soxebez.ru/award?keyword=amsco+advanced+placement+united+states+history+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412170/normal_6015b9e45c8b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454821/normal_602347c37c888.pdfIn PDF document text
    • https://cdn.sqhk.co/radofufalam/KhfaQt2/wordbrain_2_countries.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376101/normal_5fef9d540dbf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415531/normal_6046e15ad85f5.pdfIn PDF document text
    • https://cdn.sqhk.co/funixatugesi/dgciahb/86232272641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499002/normal_5fcbf0153a84a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_6027fc063677b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473916/normal_5ff7a83bcbbfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460981/normal_600e0c9fb2f08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449630/normal_60469d7a6dce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422145/normal_6042fbc63091c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5fdb248da838e.pdfIn PDF document text
    • https://cdn.sqhk.co/pulurune/OghKihG/94925561575.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456699/normal_5ffaa3188da11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421474/normal_5fff9501d28ff.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/xupovobejanam/dabunipe.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/what_does_hand_to_hand_combat_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/sahih_al_bukhari_bangla.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/viktor_frankl_logotherapy_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/papikek.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_off0000ebaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAF 5548 bytes
SHA-256: 54e6cb015272e8dbdca01f156cb3e8ea246932ab5c8765f52b2601a5e07fff61
font_01_sfnt_off0000fe71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE71 10548 bytes
SHA-256: 03dc160f24ab1b3c06dcf26281a79a8d1934f08381af4acdec5f7eb214a17d70

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