Malicious PDF — malware analysis report

Static analysis result for SHA-256 514fb58e9e5394f8…

MALICIOUS

PDF

74.6 KB Created: 2021-03-03 14:28:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a21b454636c2b0b8b07a7c4d0c3b0417 SHA-1: 485ec9deb1137ede20ec52e65b0f03f25af45b8f SHA-256: 514fb58e9e5394f85f52bf2d84c1895df958c1e4644362dc719f9a3bf8759c4d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=schwinn+213+recumbent+bike+reviews PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408002/normal_60015a758289b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_600fd9dc20559.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/54908310883.pdfIn PDF document text
    • http://idealslimitaly-ufficiale.site/34195992986mx3zh.pdfIn PDF document text
    • http://kunepuvobimamin.medianewsonline.com/are_duromax_generators_any_good.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374199/normal_5fceb09486584.pdfIn PDF document text
    • http://cosmostil.top/xejikiwunomuwegavugugexouf92s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406771/normal_5fefd80a4a97a.pdfIn PDF document text
    • http://nashremont.site/how_to_light_pilot_light_on_water_heater_with_igniterliybe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476577/normal_603e26130b995.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeborawaleko.atwebpages.com/sonicwall_tz_105_installation_guide.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/85290966192.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/imb_report_winchester.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/simulation_ionic_and_covalent_bonding_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/xurakogexojitajuluduz.pdfIn PDF document text
    • http://zepizevut.atwebpages.com/vilewinuxipiviwuxomiked.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/rti_appellate_authority_format.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/film_bikeman_thailand.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/wezurapanigepobuwu.pdfIn PDF document text
    • http://mugazukadum.onlinewebshop.net/casio_5600_solar_atomic.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_off0000e63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63C 5604 bytes
SHA-256: 146ede5c3fcf79395a9c220c2ca4c6c784a6eec172d3388b5457240bdb22526d
font_01_sfnt_off0000f949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF949 10504 bytes
SHA-256: 78aaa4c5d0ff6e971ed86036b0c78c0e155d2c7f9f3dc22331ff30c05e248d69

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