Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02d7678291e997a…

MALICIOUS

PDF

74.6 KB Created: 2021-02-06 00:08:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f406aa671c5c5f6c45578895d99345a3 SHA-1: 34a6bcd7a17866e478517c0144cfb0e02179686f SHA-256: c02d7678291e997a6f93f3a210e91580d846d2ffad0aa47a317bb3b0946fe9ac
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a large number of external links, many pointing to PDFs hosted on S3 buckets and other domains, suggesting a link farm or distribution mechanism. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate a potential for malicious redirection or content delivery, possibly leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=elvui+guide+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393916/normal_5ff699d3b9c23.pdfIn PDF document text
    • https://jafiwivejo.weebly.com/uploads/1/3/5/3/135305612/2154708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468270/normal_60118e2953ae5.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/zasolizijisuserofo.pdfIn PDF document text
    • https://betutoza.weebly.com/uploads/1/3/4/8/134899773/jezadonijuxow.pdfIn PDF document text
    • https://nozonefabizeg.weebly.com/uploads/1/3/0/9/130969368/pulavesura-tegupusav-piberezereted.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/bogeguva/litigatifumasesuv.pdfIn PDF document text
    • http://jebowozuguvufot.rf.gd/international_arbitration_act.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/halloween_worksheets_for_kindergarten_free.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/call_me_senorita_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/aviva_platform_login_adviser.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/academic_letter_of_recommendation_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/73790804871.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/android_automation_tool.pdfIn PDF document text
    • http://lejopuluke.rf.gd/81690512384.pdfIn PDF document text
    • http://xujekapowizi.epizy.com/construction_project_scope_statement_example.pdfIn PDF document text
    • http://zokivobadid.rf.gd/fewazebaxegirurudewef.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77B 4800 bytes
SHA-256: 13dc4ea52d5379189141bc5cc176c6ee2c5c7a1bdcbc95e76b6a259af026a40f
font_01_sfnt_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 10984 bytes
SHA-256: ec8f23c60ea85c4e307be10acf2d628e436fb575f1255d33450278d8f01b7e94

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