Malicious PDF — malware analysis report

Static analysis result for SHA-256 056b243aafb1919b…

MALICIOUS

PDF

65.1 KB Created: 2020-11-28 00:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a2f1d57680bed04ccfaea53f5f653b74 SHA-1: 2297f0c49f31ea8f18ccb266be2a048b6e6d4102 SHA-256: 056b243aafb1919b8fee65b913087320a4a5c4fefe41ffafe0e4ba618fdb612c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL and the document body suggest a lure related to a 'Lenovo Ideapad 320 charger' to entice clicks on malicious links.

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://trafficel.ru/strik?utm_term=lenovo+ideapad+320+charger PDF link annotation
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/jemegikireleperuzuwo.pdfIn PDF document text
    • https://pitimonajavigo.weebly.com/uploads/1/3/1/3/131383860/valal.pdfIn PDF document text
    • https://zupelewelasilag.weebly.com/uploads/1/3/4/5/134594614/mirolarejopaxow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d27cedd-3561-4dc8-85f2-0dfc55685e86/89686619873.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/edmond_de_rothschild_france_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/introduction_of_narrative_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/davaxelofikopu.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/sukikute.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/amazing_grace_notes_for_recorders.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/4545740298.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/xupadogora.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_off0000be09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE09 5564 bytes
SHA-256: a05b3b7779d98bc5d1fa05a7d08b77889a0c1cfdaa5b9920c0d6f021f61faf6e
font_01_sfnt_off0000d0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FD 11792 bytes
SHA-256: 2b90f1667556fb045233f0cf7596e313c3f7771c2470fb28a24afd864c1584cf

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