Malicious PDF — malware analysis report

Static analysis result for SHA-256 3061ad8d4eb40fe1…

MALICIOUS

PDF

67.6 KB Created: 2020-12-21 04:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5cc2b703330883997429d3c4610a6e6c SHA-1: 146273ea136018dea36f63a5b911db82673c381a SHA-256: 3061ad8d4eb40fe105ed91768c48ac70bebf5142cb50f28c7e4c67fd6d975580
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-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://traffking.ru/123?utm_term=pronoun+antecedent+agreement+examples PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384143/normal_5f8e435216ed0.pdfIn PDF document text
    • https://nigovazimosa.weebly.com/uploads/1/3/4/6/134636686/9611009.pdfIn PDF document text
    • https://ruwotepileta.weebly.com/uploads/1/3/4/4/134493455/bipura.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/lubatibekidam-kowavepe.pdfIn PDF document text
    • https://maladebo.weebly.com/uploads/1/3/4/3/134305387/703684e129e.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/nilafafakem/dunatilawosokitajaroke.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5b1b8239b07229151fec3/t/5fd06b473364176a125c21aa/1607494473302/82614698386.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/how_old_to_work_at_aldi_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/gikasitogeziwanilipaxufod.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/xunonanerizu.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/angular_formarray_disable.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce586c56a976706ec757ab/t/5fd6bbc5df2f0204c2445844/1607908294488/rafakewe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5bb7a68612547ed7f1815/t/5fd0302cfc93c51d16d5edfa/1607479342278/26748898545.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6763d68612547ed8438d4/t/5fcd88508a55f2188b900164/1607305296663/66605866953.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_off0000cba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA0 5464 bytes
SHA-256: a26d6ef2e72c7cef66beec3aba4b4c38e6e874cf5a19fddc1eb7f7e0d2cfb29c
font_01_sfnt_off0000de25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE25 10316 bytes
SHA-256: 16f62203d490b1d81d42b7719f82f96b881cd55a1b8a9d669f09ae038c26e2a8

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