Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e8915e27d35bbc…

MALICIOUS

PDF

73.4 KB Created: 2020-11-18 03:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 4955e74fd3f44c065c6e51f66fb27948 SHA-1: d9a7a41526c380e3d2c59110bb68e7356379215b SHA-256: e4e8915e27d35bbcaf36ff053111da57c411e4e3882d6af1c8dca66a6ebd0300
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/strik?utm_term=kanji+flashcards+pdf PDF link annotation
    • https://jajivinejide.weebly.com/uploads/1/3/4/3/134354145/lasatotesujoperi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f88e7125b46b.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/jupigimovizatal.pdfIn PDF document text
    • https://jevamupoledi.weebly.com/uploads/1/3/4/7/134712268/3423318.pdfIn PDF document text
    • https://fezimadi.weebly.com/uploads/1/3/4/4/134487715/1976649.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/wolina/diwepasozebunewiwok.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/neurofibromatosis_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe1b6072-d0a1-42cd-b568-f0181f2a64d1/rozoxinibimuwez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb8bf2e2-0134-47df-a7a9-8de32a51aa4f/fumed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845fbac8-aaec-4000-91a9-65c159b3a9d1/busozowezowonexaxedij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/699c85e0-9636-4cc1-8df2-edf5e1ca89d5/15492373237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4da73fb-501a-4f84-983c-438760c026c3/26292017807.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F6 7524 bytes
SHA-256: 5e2f857f4fcbfbb172506457749d5bc7ceec5b1d666d7f93e2f1af30ae811148
font_01_sfnt_off0000e37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37B 5288 bytes
SHA-256: e8776ad4355ba322089861b762bc75c1f357e11c2022f486f2c3a8e3c2769cfc
font_02_sfnt_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 10432 bytes
SHA-256: be2084bed8b76fdc8f458eaa8a3ac827321c5c3f35bb9bbc897f7447c8c11d33

Open this report in the interactive analyzer, or submit your own file for analysis.