Malicious PDF — malware analysis report

Static analysis result for SHA-256 507484eaa9d3afdd…

MALICIOUS

PDF

74.6 KB Created: 2021-03-22 09:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cf3d22a05638bb6146438596653aef5 SHA-1: bc8ea343767e79d877e4595306fdb345b852101e SHA-256: 507484eaa9d3afdd18a4a2060091d4b242a16c56cb218a9bfbd0485d0e54d8da
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that points to a suspicious domain, identified by heuristics as a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://seumenha.ru/wix?keyword=function+operations+composition+worksheet
    • http://raisinslabs.club/pdf_to_word_converter_zamzarnffcd.pdf
    • https://static.s123-cdn-static.com/uploads/4378383/normal_5fdd166764c54.pdf
    • http://anrostore.ru/jupiter_japan_income_fund_fact_sheeto4q61.pdf
    • http://goodshopsales.xyz/english_speaking_words_daily_use_in_tamil8sfsx.pdf
    • http://fineagencyy.com/25531031167vqx4x.pdf
    • https://static.s123-cdn-static.com/uploads/4497368/normal_6003dea00bd96.pdf
    • http://immorta-cross1.club/jirovem1rsuq.pdf
    • http://esclub.pro/311307065504izwf.pdf
    • http://tabikola.online/mothers_day_inspirational_quotes_from_husband5bi6k.pdf
    • http://esmoney.site/smoke_editor_steam_effects_photo_studioszbq40.pdf
    • http://rukozhop-guide.com/pitudinujeperewipejugveaf.pdf
    • http://labiosdewonda.com/lemon_sheet_cake_recipes_easymdh1w.pdf
    • http://byt-upak.ru/781179768473qh00.pdf
    • https://cdn-cms.f-static.net/uploads/4406228/normal_6034fda565d23.pdf
    • https://cdn-cms.f-static.net/uploads/4417222/normal_601af9bf39545.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_9bb995c35a904df68a3f9f20e80a3f02.pdf?index=true
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_2765216c09ba47d29e6ff04101d6a1b0.pdf?index=true
    • https://d89a15f7-21b5-45f0-b9b4-bc5b7be68842.filesusr.com/ugd/18e821_c9426a0944db4d6eb6dc9350d5e8f45e.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e832.bin
bdf25ad9d5a6887195729c5e4abf2611629e6778371f9775d3cc15bf71491c9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE832 5252 bytes
font_01_sfnt_off0000f9fb.bin
f0b3d3686024b128f5965613973c50184d4212120496e58efd5974f312e27618
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 10288 bytes