Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c90c2b5ee37e460…

MALICIOUS

PDF

77.1 KB Created: 2021-02-21 20:21:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5ed8c596083ff3aad094afea14419d10 SHA-1: 5335232889d3177949a88603e5c9086cd5a6d949 SHA-256: 4c90c2b5ee37e4603feba360f83b5e86ecf2e1a7f8172103d895d8b527cbe1b2
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://leonvi.ru/aws?utm_term=a+scanner+darkly+book+vs+movie PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465133/normal_5feb8868d37a6.pdfIn PDF document text
    • https://cdn.sqhk.co/lojegalivo/F2FJibS/jt_global_mobile_top_up.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5fd058d652af2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454543/normal_5fcecf6737666.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448746/normal_5ff56997d6072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376127/normal_5fc6c9043195d.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/bhf4Ufu/63712687327.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/d9ggSOt/10405326223.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480403/normal_5fdad4a96e73c.pdfIn PDF document text
    • https://cdn.sqhk.co/tudenireso/ehejcZv/boxezuxixubiwi.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/tezude/keto_diet_plan_guru_mann.pdfIn PDF document text
    • http://zuwemanikipe.rf.gd/cholcystite_chronique_lithiasique.pdfIn PDF document text
    • http://disofebuwugojuj.epizy.com/26636515877.pdfIn PDF document text
    • http://kugofabafomozo.epizy.com/vafidoderulepabif.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/midawolirifuk.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B5 5440 bytes
SHA-256: d2d158ec4556c5ba23fa0c31bce03c1a0fad3e07ecc7a9260012c67edd64860a
font_01_sfnt_off0000f82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82D 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0001038f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 10524 bytes
SHA-256: d6f4e342ba03cec9966f4d249f05d415a262fb86c92e27da7792092f78690a1d

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