Malicious PDF — malware analysis report

Static analysis result for SHA-256 615efdcf98c0990e…

MALICIOUS

PDF

72.4 KB Created: 2020-12-17 09:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0fa0c526313aa37b0b413e7c0de95df6 SHA-1: 9793fb71eb21d1217183d82dca1a53078eaa56f2 SHA-256: 615efdcf98c0990efacbc757bf8e29316dc0a3d464799aafbcd83ab6b7e22712
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=macbeth+study+guide+questions+act+1 PDF link annotation
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/7af8ed.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/zolaso_galiwesivaseju_nitelunosan.pdfIn PDF document text
    • https://pizolixes.weebly.com/uploads/1/3/4/8/134874149/475e19cc7a7ee5e.pdfIn PDF document text
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/rokewa-jenoxo-beduduk-xadafeziro.pdfIn PDF document text
    • https://sivusemekatew.weebly.com/uploads/1/3/4/4/134491367/xatutu.pdfIn PDF document text
    • https://wibiwiterudek.weebly.com/uploads/1/3/4/3/134373050/3766423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8722e9447ea.pdfIn PDF document text
    • https://tanaxigurav.weebly.com/uploads/1/3/4/2/134266775/denesanijibep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/widofafane/guided_access_mode_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/haynes_repair_manual_2016_honda_civic.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/16368980282.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/quotes_from_johannes_gutenberg.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/38843651107.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/karnofsky_performance_status_kps_index.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/pattern_symbols_worksheet.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_off0000d08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08C 5380 bytes
SHA-256: 4f4573f0f57b9beed5b0373d8fa0d4ca004a7eaf78e2e237a6d2be7616c4f9a4
font_01_sfnt_off0000e2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 10376 bytes
SHA-256: 2d2cd659ca803fbdd2c8b86ded82da83288c788318ac6ef017b3240a42768d0b
font_02_sfnt_off00010660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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