Malicious PDF — malware analysis report

Static analysis result for SHA-256 45236b16522f4977…

MALICIOUS

PDF

98.5 KB Created: 2021-02-22 20:07:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 7da40624df390026329dc9da45199903 SHA-1: f57ec267728e26b9e0df07b5d2aed58c6401b1c9 SHA-256: 45236b16522f497786b72ff818873b3a7f667e913ef8c7a5aa7ad62aa099d159
104 Risk Score

Malware Insights

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

The PDF document uses an invoice lure to trick the user into clicking an embedded URL. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it is designed to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=principle+of+corporate+finance+11th+solution+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4373502/normal_5ff338f2a6fdb.pdfIn PDF document text
    • http://spencermcman.us/diwuxelubst6d.pdfIn PDF document text
    • https://ganegekisawaji.weebly.com/uploads/1/3/1/4/131406809/a7e2435d8c5c39.pdfIn PDF document text
    • http://sallles.ru/nigujelutur8kfjn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412757/normal_600b980b7e9aa.pdfIn PDF document text
    • http://stassikorskyi.com/xelujifajovupb3boq.pdfIn PDF document text
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/3918358.pdfIn PDF document text
    • https://jalesebexiw.weebly.com/uploads/1/3/0/7/130739560/jakomin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_6013216e8579e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5ff76d39b955d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_601fb27a600fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_602cd99e05c72.pdfIn PDF document text
    • http://ionatr.fun/charam_sukh_web_series_freeo6jk1.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/zivalug.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/uniformly_accelerated_motion_inclined_plane_lab.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/central_nervous_system_infection_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/73691941319.pdfIn PDF document text
    • http://livofos.epizy.com/advanced_muscle_building_program.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_off00012a1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1A 4256 bytes
SHA-256: c14a6e0f29df1ee24a9e09feacc0f8939d9067c2193979b6db2c5499fb20bcbc
font_01_sfnt_off000139cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139CC 5308 bytes
SHA-256: f9dcaa7025aef4cf2657c393abcacdba1bc4b1c604b3e12cb84610953be740e0
font_02_sfnt_off00014bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB3 15312 bytes
SHA-256: 75d5543f77c270eef93d597067a3f8f56ac1baf224e3a32b92c585d7778a4925

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