Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb2eb125ad70c451…

MALICIOUS

PDF

77.1 KB Created: 2021-02-20 00:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9aa8c4192ddb29f6f026727a7fd34ac0 SHA-1: 5a72a6fcb3246e932a41714c96c9199f2812895c SHA-256: eb2eb125ad70c451cee9c3d68e1eaa25657f69035a162ae635969a7834b39336
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm with numerous external URLs, suggesting a tactic to redirect users to potentially harmful websites. The presence of these links and the overall structure align with phishing or SEO manipulation schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/wix?keyword=letter+to+dad+on+wedding+day+from+son PDF link annotation
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/8190554.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392664/normal_600493b7b54a1.pdfIn PDF document text
    • http://meduduwaje.22web.org/android_auto_day_night_mode.pdfIn PDF document text
    • https://dudobafileziv.weebly.com/uploads/1/3/5/3/135331993/dakanel_mezafe_duzetogotojeku.pdfIn PDF document text
    • https://pifunugujo.weebly.com/uploads/1/3/4/4/134455612/cb2b7ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5ff4c9ca41fcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457005/normal_5ffb49e0edcca.pdfIn PDF document text
    • https://cdn.sqhk.co/panosiritu/iigcHbR/best_movie_collection_database_app_2019.pdfIn PDF document text
    • https://kefejuze.weebly.com/uploads/1/3/1/6/131606268/1422142.pdfIn PDF document text
    • https://jujipepovoduvu.weebly.com/uploads/1/3/4/0/134017188/c9f4d051d61e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373768/normal_5fcc10422a0d2.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/7f8d1ba.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/rerinago/xeligekoxikopedutiruk.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/isobutyl_chloroformate_reaction_with_carboxylic_acid.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_off0000f263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF263 5328 bytes
SHA-256: 53c9191303f93d476690e58670742afff0d1c1475cb0d74041511e0a06af34ec
font_01_sfnt_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 10100 bytes
SHA-256: e93d56e316713259ca090af595c4a813b9c8f4f858d57a0bc96f524f7fedc423

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