Malicious PDF — malware analysis report

Static analysis result for SHA-256 282c3b0cbdfb2d40…

MALICIOUS

PDF

72.1 KB Created: 2021-03-17 08:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 38dc1699dbffca6f4cd2648403081cbc SHA-1: 519bda8544b4460f6220c88ea3dc3417992b5eda SHA-256: 282c3b0cbdfb2d402d43f8faed1aa62d8d78c50e132146214dbfd3fd916d8f55
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with several pointing to known malicious redirectors and link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/123?utm_term=live+sport+hd+tv+shqip+apk In PDF document text
    • https://kuwumezebuxe.weebly.com/uploads/1/3/4/1/134131528/luwavege.pdfIn PDF document text
    • https://fegafedanopi.weebly.com/uploads/1/3/4/3/134311678/minazamuf_zozatupit_ridiparudaxeve.pdfIn PDF document text
    • http://azorocheat6.xyz/tujazadojogizujodufb6a1.pdfIn PDF document text
    • https://vamolitewule.weebly.com/uploads/1/3/4/6/134670516/samamudito_loxapo_vikimuvija.pdfIn PDF document text
    • http://prizinsta.online/mibamidesuwufotuluqpal8.pdfIn PDF document text
    • https://dolepaxutafajur.weebly.com/uploads/1/3/0/9/130969408/6167832.pdfIn PDF document text
    • http://baranaydin.org/59511656584bfqk6.pdfIn PDF document text
    • https://vomuxetajamusu.weebly.com/uploads/1/3/1/8/131857717/8126844.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_d9eb825593c34287b170df298b80c6a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/how_to_analyze_aggregate_report_in_jmeter.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/californication_bass_tabs.pdfIn PDF document text
    • https://34e223d5-b18a-4f89-96b3-7c58aa965d90.filesusr.com/ugd/440e29_f5d7ae14b1a142b2a2f25a217cf3322e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/62735845114.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/zogomopi.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/77145374772.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/88223828553.pdfIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_b0582d63531844fb8c5a0060e3c3fc65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kukazowox/turokuduli.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/xexewogovivakabinagug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eafefafc-181a-4838-9931-ca2702291244/68155767776.pdfIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_513724c51a39492cbc5403a5876a3a28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75903fc-f614-4c01-95e8-ae49cf42e1f9/what_subjects_do_you_need_for_project_management.pdfIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_61c612a0864f42158293bf726e4ea082.pdf?index=trueIn 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_off0000d9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BF 5204 bytes
SHA-256: a42ed8c2ccd53101244db2722006bba77c209fb23f8b6f7aaf1e96846434a164
font_01_sfnt_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 12068 bytes
SHA-256: 85b56d8d73217cea9d877b144acc70c7da8a023229e4de4d868edc43ffc8bb86

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