Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5565772e06b48e6…

MALICIOUS

PDF

153.9 KB Created: 2021-02-10 19:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 473547e3181ed5e26e4c7208dc54c190 SHA-1: 447fa735fbde47944143256fc46bc51dd0d82787 SHA-256: d5565772e06b48e602e6eae9101c38aeb1777207268cf848ce47722b1657abf7
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website disguised as a performance appraisal system manual. This URL is likely used to host a malicious payload or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://jacksth.ru/aws?utm_term=deped+performance+appraisal+system+for+teachers+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372376/normal_5ff1dc00b8d7c.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/bhcV0gc/tavexozolugijapo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426541/normal_5fedda2a5c26a.pdfIn PDF document text
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/f3d2373f064808a.pdfIn PDF document text
    • http://taxavifosobedul.iblogger.org/listado_de_precios_aduana_de_cuba.pdfIn PDF document text
    • https://wonumajogo.weebly.com/uploads/1/3/1/3/131379434/6998166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529095/normal_601229e1ce7a6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421776/normal_5ffe6f8ee67c6.pdfIn PDF document text
    • http://interstart.online/ouro_verde_capitulo_1240eu8w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5fcba554990ce.pdfIn PDF document text
    • https://nuvusutapisi.weebly.com/uploads/1/3/4/4/134460305/9170389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462066/normal_600c6d45c3a60.pdfIn PDF document text
    • https://cdn.sqhk.co/teposodigar/jhXHVMQ/prince_temple_run_game_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_5fe6e6b74b910.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/bjhIVjb/modesto_furniture_stores.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474752/normal_6018354a9a00a.pdfIn PDF document text
    • https://gelupolo.weebly.com/uploads/1/3/5/3/135314506/1786619.pdfIn PDF document text
    • https://lobogisotu.weebly.com/uploads/1/3/4/8/134870795/fezilajirolupos.pdfIn PDF document text
    • http://vvinorama.fun/carta_a_mi_esposo_por_su_cumpleaC3B1osm2a8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mowumaja.epizy.com/zizupotuzerimonomivabuzaj.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_off00021f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21F39 5496 bytes
SHA-256: 60f178b9166c1ddec5c51287e0f0fa8aa521483aafc1fa6bb842a89295cde1e9
font_01_sfnt_off000231c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231C7 11520 bytes
SHA-256: 56fd558cb1d355c7c3c4a38021877f5cb568d9a83d1f609215e65b00e58e2ae8

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