Malicious PDF — malware analysis report

Static analysis result for SHA-256 96030e8a29a40e68…

MALICIOUS

PDF

108.4 KB Created: 2020-11-19 07:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e436af4df46cfef904e1f3d1d59de1a2 SHA-1: 516b89be7dfff1fdd3de77b6c3ea232a7f8d5f11 SHA-256: 96030e8a29a40e68997919bd7b4b038e0db6ec8561986f953d3d0eddbdec8639
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest a phishing or malware distribution attempt, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=scottsboro+an+american+tragedy+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4469860/normal_5fa4255e822f4.pdfIn PDF document text
    • https://gikatufezido.weebly.com/uploads/1/3/4/3/134338368/6492173.pdfIn PDF document text
    • https://vabebixeteguju.weebly.com/uploads/1/3/4/2/134234611/gepubatuzalu.pdfIn PDF document text
    • https://dabagurujor.weebly.com/uploads/1/3/4/3/134350609/1477025.pdfIn PDF document text
    • https://jozudepixivi.weebly.com/uploads/1/3/4/6/134682498/5563121.pdfIn PDF document text
    • https://winuvepesedop.weebly.com/uploads/1/3/4/4/134476249/tafuteko.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/gixawetopoli/pejafu.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/71064594209.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/73922580486.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/gel_electrophoresis_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/sql_plsql_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/competitive_splatoon_discord_servers.pdfIn PDF document text
    • https://s3.amazonaws.com/ruletetunima/30546193310.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_off00016d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D3D 5572 bytes
SHA-256: e1cd1b99155c9b81af89fa94f73a29f549b24d538b90498502b73911234da5e0
font_01_sfnt_off0001801e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1801E 10624 bytes
SHA-256: 1e635d7642f7f684403558b34a7c135d192be94e42c1480643302dd12b308317

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