Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f826802dd10d54…

MALICIOUS

PDF

72.5 KB Created: 2021-02-15 22:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f749962dbda9c47e97d6327c7296de41 SHA-1: 7c239a971f67fbbf544d9948dfc4d7e953f67b9b SHA-256: b1f826802dd10d5418e07ce1d4f905a8f915e634482281c8f9e4fba638888caf
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/123?utm_term=definicion+proceso+de+investigacion+cientifica PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416151/normal_6014e83434aa9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5fd982205672c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455639/normal_6007236b9a64d.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/pPXojc6/mowinirisaguzatebelatope.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377114/normal_5fe1fa92b44fa.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/OHggvHW/pressure_washer_surface_cleaner_casters.pdfIn PDF document text
    • https://durabikat.weebly.com/uploads/1/3/4/5/134512276/83119.pdfIn PDF document text
    • http://stav-games.ru/36681908759gczwc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385038/normal_5ff9185319933.pdfIn PDF document text
    • http://cooldomen.space/24692824030le5o3.pdfIn PDF document text
    • http://sell-toclick.online/earth_s_atmosphere_worksheetm4ug0.pdfIn PDF document text
    • https://vosojexurixug.weebly.com/uploads/1/3/1/0/131070535/zosutuwu-tapiserititadu-kaxeg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418370/normal_5fcdc0619c11e.pdfIn PDF document text
    • https://dufelawukada.weebly.com/uploads/1/3/2/6/132682042/456c8a3879805db.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/mexavofezoxi/autodesk_revit_2016_mep_fundamentals.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/negemejulifaxad.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/acknowledge_of_debt_template.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_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 5348 bytes
SHA-256: ceb3dea4df4ad13bb97947b3c8a7bd9b57fb14b8400a7c88f0ab95846905c870
font_01_sfnt_off0000ee77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE77 11260 bytes
SHA-256: c9b98eeb03559fdb50edeb6cecb9efe2c0cf738d19866ec538ce86f0b44220b0

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