Malicious PDF — malware analysis report

Static analysis result for SHA-256 349dd4d427a76647…

MALICIOUS

PDF

70.2 KB Created: 2020-11-12 00:34:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 52afb7bea2a5fa5a0cefa36e4f9ed189 SHA-1: df1abd59d0493d9bb2d4894ca1be6bb979866375 SHA-256: 349dd4d427a76647635a3265ca98273b7c6531224656af1321184be5c0644dde
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffnew.ru/strik?utm_term=deep+space+wifu PDF link annotation
    • https://mugekezozo.weebly.com/uploads/1/3/1/6/131636766/6601460.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/7322598cb5.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/rixaputu-xokibilap-dusima.pdfIn PDF document text
    • https://tisefujuset.weebly.com/uploads/1/3/4/4/134488269/7693004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d4b7019a-5048-44f4-b131-0a0e4095beeb/1376466182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b8956a-0b2e-4bec-b5c0-0ac4f5acbf0b/baja_no_pinch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3860362c-646c-4834-9d28-c0bfb6154ac1/descargar_un_clavado_a_tu_cerebro_pd.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/18488543948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2837335-668a-4380-94ff-454518ec727c/teatro_griego_partes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6b9aa0-e7e3-4d55-a5ca-7f41408c5fc6/gegixezefew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea92318d-42e0-4e27-a326-dea98ced56f0/rizagesax.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/computer_literacy_lesson_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6dbb74-a3be-424e-a2b7-77f0f5a32a11/gufeguruvefugibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d64f5bfe-ac4e-468b-b4cf-a9731fa22d70/sefanipifu.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/english_3_midterm_study_guide.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC99C 4560 bytes
SHA-256: a03499ea96fe7f2c16c726606853b8536fa066a946fa70377d697498d46c9bba
font_01_sfnt_off0000d93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93B 10788 bytes
SHA-256: 222457d0c71c576ddf85b4ebf6849c43a3ccd6602e5778766c074a9bf9ced67e
font_02_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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